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Why We Sleep: The New Science of Sleep and Dreams


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Best price: £9.62 (12% off)

Product Summary

The Top Ten Sunday Times Best Seller TLS, Observer, Sunday Times, FT, Guardian, Daily Mail and Evening Standard Books of the Year 2017 Penguin presents the audiobook edition of Why We Sleep by Matthew Walker, read by John Sackville.

Description

The Top Ten Sunday Times Best Seller TLS, Observer, Sunday Times, FT, Guardian, Daily Mail and Evening Standard Books of the Year 2017 Penguin presents the audiobook edition of Why We Sleep by Matthew Walker, read by John Sackville. Sleep is one of the most important aspects of our life, health and longevity and yet it is increasingly neglected in twenty-first-century society, with devastating consequences: every major disease in the developed world - Alzheimer's, cancer, obesity, diabetes - has very strong causal links to deficient sleep. Until very recently, science had no answer to the question of why we sleep, or what good it served, or why its absence is so damaging to our health. Compared to the other basic drives in life - eating, drinking, and reproducing - the purpose of sleep remained elusive.

Brand

Audible


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Product Review Analysis*

Positives

Neutrals

Negatives

70.6% 12.8% 16.6%

Senti score  [83.4%]

* hover your mouse over a word to see more details
informative brilliant worse truly enlightening excellent terrible readable deprived amazing wrong sleep terrible damage great extremely boring fascinating boring miss feel terrible better repetitive difficult absolutely brilliant insightful best really fascinating lose

Pros & Cons

truly enlightening

"easy to read and truly enlightening an essential book for everyone"
100.0%

really fascinating

"really fascinating read very impressive information i’ve now changed my sleep patterns and feeling real benefits"
100.0%

absolutely brilliant

"absolutely brilliant and will save lives i have no doubt"
100.0%

very informative

"it is very informative and well written"
100.0%

absolutely incredible

"its absolutely incredible that sleep is not given greater importance in our society"
100.0%

absolutely fascinating

"easy to read and absolutely fascinating"
100.0%

thoroughly enjoyable

"this is a thoroughly enjoyable and extremely educational book a must read for anyone even remotely interested in anything to do with sleep"
100.0%

very pleased

"book arrived promptly it is a gift am sure the recipient will be very pleased"
100.0%

brilliant writer

"matthew walker is a brilliant writer and i hope to read more from him in the future"
100.0%

excellent throughout

"the writing is engaging and excellent throughout"
100.0%

super interesting

"and most people find it super interesting even for a dinner conversation"
100.0%

writing enjoyable

"great summary of research writing enjoyable to read i bought this having first read it from the library"
100.0%

very detailed

"interesting but very detailed"
100.0%

brilliant insightful

"brilliant insightful and mind opening read highly reccomended"
100.0%

amazing lecture

"reading this book is like going to an amazing lecture"
99.9%

amazing information

"amazing information but as a product well it’s a book what else can i say"
99.9%

amazingly informative

"amazingly informative book that explains the science behind sleep"
99.9%

beautifully written

"beautifully written"
99.9%

fascinating information

"fascinating information in this book not an easy read so don't try and read it before you fall asleep as it needs concentration!"
99.9%

highly informative

"it’s fact filled i love trivia and highly informative"
99.8%

incredibly well

"an incredibly well written book bursting with interesting and thought provoking scientific and factual information explained in such a way that the average reader will be able to understand"
99.8%

really informative

"a really informative written in a way that is easy to read book"
99.7%

highly recommend

"highly recommend"
99.6%

best thing

"the best thing about this book other than its readable style is that dr walker backs up all his statements with detailed explanations of the research carried out and the interpretation of the results leaving readers in no doubt about his conclusions"
99.6%

wonderful to read

"the clarity of the examples the empathy towards the listener always clear about the health risks never patronising make this book wonderful to read"
99.4%

greatest advances

"such practices have powered the greatest advances in human welfare in the history of the race"
99.3%

really good

"really good read and helpful info to get a good nights aleep"
99.3%

compelling narrative

"walker weaves science and storytelling into a compelling narrative that challenges our current societal conversation that makes heroes out of the sleep deprived"
99.3%

inspiring read

"inspiring read surely something to reflect upon and hopefully change one’s life patterns"
99.1%

more productive

"in turn this has improved my mental health made me more energetic less moody more productive improved my physical capabilities and my skin is the best it has ever been"
99.0%

absolutely amazing

"i found it an absolutely amazing read both for my own sake and in terms of informing my clinical practice"
99.0%

tremendously readable

"tremendously readable"
98.4%

fascinating stats

"some fascinating stats and compelling at stages"
98.1%

highly engaging

"it’s quite unusual for what is effectively a scientific book to come across as highly engaging interesting and instructive "
98.1%

very impressive

"really fascinating read very impressive information i’ve now changed my sleep patterns and feeling real benefits"
95.6%

shared behaviour

"insight and helpful understanding of the shared behaviour"
94.2%

excellent and informative

"excellent and informative and great service"
93.9%

informative and enjoyable

"very informative and enjoyable "
93.5%

absolutely loved

"absolutely loved it and have lent it to a number of people who have also really enjoyed it"
93.5%

informative and full

"very informative and full of good advice"
93.1%

certainly genuine

"walker’s concerns are certainly genuine and his accounts of a world plagued by sleep deprivation are real"
93.1%

best performance

"the best performance enhancing non drug you can take physically and mentally"
93.0%

quietly spoken

"after reading the book i saw the quietly spoken english man on a podcast and he came across extremely well"
92.8%

exceptional lucidity

"he present facts about sleep with exceptional lucidity"
92.8%

profoundly life

"profoundly life changing book"
92.7%

openingley informative

"this book is extremely well written and so eye openingley informative"
92.7%

absolutly fascinating

"absolutly fascinating"
92.0%

well written

"it is very informative and well written"
91.2%

outstanding and important

"an outstanding and important book addressing an astonishing gap in general knowledge about sleep"
91.1%

absolutely great

"content absolutely great"
90.0%

very well documented

"it is very well documented and is absolutely back by strong and extensive research"
89.2%

packed full

"packed full of research and data but all relevant and v"
88.9%

good neuroscientist

"matthew walker is a good neuroscientist and his description of the science behind sleep patterns is very helpful"
88.8%

academic and engaging

"it manages the balance between academic and engaging read very well"
88.4%

fascinating and plenty

"really enjoying this book fascinating and plenty of factual evidence"
88.3%

great communicator

"prof taylor is a great communicator judging by his media appearances and he may have left these out for valid reasons but i’d welcome a 2nd edition addressing these things"
88.0%

science in the title

"i enjoyed the book although it was more scientific than i expected even though did say science in the title ?"
87.9%

liked everything

"i liked everything on this book"
75.0%

efficient delivery

"great product good value for money efficient delivery would recommend 👌🏻"
75.0%

good sleep

"it just enforcing the wisdom around good sleep"
75.0%

really useful

"really useful"
75.0%

promote alert

"our local branch of rospa advanced driving will be looking into this aspect of fatigue and what can be done to promote alert and safe drivers"
75.0%

very compelling

"the conclusions and suggestions for individual and societal change are very compelling"
75.0%

intricate details

"a really comprehensive read if you are looking to find out how to improve your sleep but also more intricate details of how our brains and bodies benefit from sleeping"
75.0%

passionate account

"walker writes a passionate account of the importance of sleep in mitigating everything from cancer cardio vascular disease dementia and obesity as well as its ability to promote learning improved immunity and mental health"
75.0%

valuable information

"valuable information that can change and improve lives with the act of sleep"
75.0%

elegant sense

"a neuroscientist with an elegant sense of humour and the skill of a poet!"
74.9%

helpful info

"really good read and helpful info to get a good nights aleep"
74.9%

really well

"it’s really well written & interesting"
74.9%

life quality

"let's start a revolution for a better life quality!"
74.9%

strong recommendation

"strong recommendation!"
74.9%

improved immunity

"walker writes a passionate account of the importance of sleep in mitigating everything from cancer cardio vascular disease dementia and obesity as well as its ability to promote learning improved immunity and mental health"
74.9%

safe drivers

"our local branch of rospa advanced driving will be looking into this aspect of fatigue and what can be done to promote alert and safe drivers"
74.9%

more efficient

"if you want to be healthier happier slimmer and more efficient and effective at work please read this book!"
74.9%

diminish profits

"for most industries with the exceptions of firms like google and nasa an upheaval of human resource policy would diminish profits in ways that are difficult to predict"
74.9%

have attended

"this books enhanced the "sleep science" lectures i have attended"
74.8%

incredibly useful

"this book is an incredibly useful read packed full of interesting facts about the importance of sleep and how to get more of it"
74.8%

clear passion

"such a informative book really well written from a man with a clear passion for what he does fascinating what sleep actually does for us!"
74.8%

fiercely competitive

"in fiercely competitive industries changes as suggested will take decades or centuries"
74.7%

monumental book

"this monumental book encompasses a lifetime of research and a harvest of studies from around the world and it is brimming with theories and ideas and stories"
74.7%

full advantage

"taking full advantage of the latest research equipment and experiments this presents a full frank and alarming review of both our understanding of sleep and the consequences of the ways we're murdering it"
74.7%

interesting insights

"lots of interesting insights in this book"
74.7%

good night

"good night!"
74.7%

life saver

"it’s a real life saver"
74.6%

educational book

"it is written in such as a way that it feels like a thriller in man y ways rather than just an educational book"
74.6%

reasonably intelligent

"it's written in an interesting and accessible way for the reasonably intelligent reader and contains some really useful if slightly scary info on how our brains work while we sleep and even more scarily the consequences of not sleeping enough"
74.6%

riveting reading

"why we sleep was riveting reading for me"
74.5%

great summary

"great summary of research writing enjoyable to read i bought this having first read it from the library"
74.5%

interesting look

"interesting look into how sleep works why we sleep and everyday advice on how get the most from your sleep"
74.5%

quality sleep

"one other area of focus is the role that artificial light caffeine alcohol and sleeping pills have on the suppression of good quality sleep"
74.5%

informative book

"such a informative book really well written from a man with a clear passion for what he does fascinating what sleep actually does for us!"
74.5%

practical info

"full of fascinating sciencey information interesting anecdotes and practical info on how to sleep better and why this or that technique works"
74.5%

walker's facile statement

"walker's facile statement that any one dream can be given different explanations by different commentators he plays some sort of hoax on his students where he gives any dream they tell him about the same interpretation merely illustrates his failure to understand what he is talking about"
74.4%

will probably

"and it will probably change your approach to life because as you work through it you realise how important sleep is to so many areas of life whose connection to it you had never thought of"
74.4%

very helpful

"matthew walker is a good neuroscientist and his description of the science behind sleep patterns is very helpful"
74.4%

most relevant

"matthew walker does a remarkable job condensing the most relevant knowledge and latest facts from studies on sleep"
74.4%

sleep plans

"the economic incentives for firms to change to healthy sleep plans would go against their short term incentives"
74.4%

great book

"a great book bringing sleep research to the unwashed masses"
74.4%

emotional state

"i can only recommend this book to anyone who has ever experienced that strange physical mental emotional state we refer as sleeping"
74.4%

eloquent easy

"it is very engaging read as well as informative the authors language is eloquent easy and very readable"
74.4%

most compelling

"this has to be one of the most compelling and fascinating ‘wellness’ books i’ve ever read"
74.3%

very useful

"lots of very useful information about sleep from one of the world experts on the subject"
74.3%

insightful sections

"some parts were dry but the insightful sections made this a worthwhile read overall"
74.3%

very interesting

"very interesting research projects clearly explained in plain english"
74.3%

good value

"great product good value for money efficient delivery would recommend 👌🏻"
74.3%

more energetic

"in turn this has improved my mental health made me more energetic less moody more productive improved my physical capabilities and my skin is the best it has ever been"
74.2%

enlightening reference

"the most enlightening reference i have ever read"
74.2%

interesting studies

"soooo interesting very helpful i have slept for 8 hours each day for a week now and will keep this habit for sure thanks to all those interesting studies"
74.2%

fast shipping

"good read and fast shipping"
74.2%

interesting and easy

"very interesting and easy to read"
74.2%

powerful information

"one caveat to the book and more generally applicable to science based advice is that we should use this powerful information in a holistic way"
74.2%

interesting topic

"interesting topic and seems to be in depth maybe it's just not what i was expecting"
74.1%

very potentially

"the information about sleep in this book seems so very important for all in my view it’s a must read for everybody very potentially life saving information"
74.1%

amazing book

"i encourage you to read this amazing book all backed up by scientific experiments"
74.1%

self improvement

"if you're into self improvement of any kind this book is absolutely unparalleled"
74.1%

self help book

"effective self help book giving advice on why sleep is important and how to get enough sleep"
74.1%

excellent book

"excellent book for anyone wanting to understand why sleep is so important ideas to assist sleep research done etc"
74.1%

perfect conditions

"book arrived in perfect conditions"
74.1%

well worth

"dr walkers google talks are also well worth watching"
74.1%

really comprehensive

"a really comprehensive read if you are looking to find out how to improve your sleep but also more intricate details of how our brains and bodies benefit from sleeping"
74.1%

precious commodity

"what's more it's thoroughly readable a precious commodity in a science book without dumbing down for the reader"
74.0%

energy and quality

"it's given me more energy and quality of life with a few simple tweaks from the information here"
74.0%

excellent read

"i found this book to be an excellent read"
74.0%

integral part

"who knew that sleep plays such an integral part in our overall well being"
74.0%

simple and practical

"suggestions are simple and practical highly recommended"
74.0%

myself recommending

"while not a self help manual or a how to guide it is having a profound effect on how i approach my life and i find myself recommending it and sharing the findings of it with family friends and policy makers"
73.9%

impacting negatively

"it explains the science behind caffeine and alcohol and how these affect our brains impacting negatively"
73.9%

very readable

"very readable"
73.9%

useful insights

"useful insights for the power of sleep for your brain and body health"
73.9%

much simpler

"well there could be a much simpler explanation"
73.9%

insightful comments

"man insightful comments on the need to establish a regular sleep pattern"
73.9%

easy to read

"this book was easy to read but has so many important conclusions"
73.9%

awesome book

"awesome book"
73.8%

very thorough

"would highly recommend this very thorough examination of sleep or the lack thereof in society"
73.8%

evangelical zeal

"i hope i can find the resolve to change mine before it's too late and i will be pressing this book on everyone i know with evangelical zeal"
73.8%

restful sleep

"i am a medical professional and know about the importance of restful sleep but found so much new information about sleep and brain development that is very important to know for all"
73.8%

clear and compelling

"this book raises awareness regarding the need for sleep in a clear and compelling read"
73.8%

helpful understanding

"insight and helpful understanding of the shared behaviour"
73.8%

interesting read

"very interesting read backed up with in depth research"
73.7%

well enough

"do you feel you're not performing well enough at sports?"
73.7%

rain water

"another great book that was marinated in rain water outside the text was bought to life by the rippled pages and darker paper"
73.7%

readable style

"the best thing about this book other than its readable style is that dr walker backs up all his statements with detailed explanations of the research carried out and the interpretation of the results leaving readers in no doubt about his conclusions"
73.7%

clear and comprehensive

"a superb clear and comprehensive account of sleep why we need it how much we need what the latest science is"
73.6%

widely read

"should be widely read"
73.6%

overall gain

"many books i read are about a subject i am quite familiar so the overall gain is slight but significant"
73.6%

nature's healer

"part of me is also gratified to find scientific confirmation of old wives' tales and instincts about sleep: "an hour before midnight is worth two after" "sleep is nature's healer" "got to get my beauty sleep" etc"
73.6%

even humorous

"written by a prof it's readable and even humorous in parts and is a great myths buster around this the most important aspect of life"
73.6%

blood pressure

"maybe you have high blood pressure?"
73.6%

provides solutions

"amazing is the fact that it provides solutions and gives many ideas to the reader"
73.6%

knowledgeable book

"highly recommend this brilliantly written common sense and knowledgeable book"
73.5%

best seller

"interesting read no wonder it's a best seller"
73.5%

editorial direction

"this book would have benefitted from some good editorial direction"
73.5%

positive effects

"an easy and enjoyable read i highly recommend this and hope it has positive effects on the reader and wider society as a result of it being published"
73.5%

involved exceptionally

"the work describes the nature of sleep and the parts of the body involved exceptionally well"
73.5%

vital information

"a real eye opener why doesn't everyone know this vital information!"
73.4%

witty humour

"it’s a great read that gets across a very serious message but also has light hearted witty humour throughout!"
73.4%

profound benefits

"thank you for informing me about the profound benefits of a full nights sleep on my body"
73.4%

saved my life

"has probably saved my life"
73.4%

insightful read

"helpful insightful read"
73.3%

greater importance

"its absolutely incredible that sleep is not given greater importance in our society"
73.3%

informative nature

"the informative nature of this book cannot be denied"
73.2%

thankyou thankyou

"thankyou thankyou"
73.2%

sleep awareness

"i would recommend that everyone needs to have sleep awareness"
73.2%

utmost importance

"informative articulate and well researched this is a fascinating and important thesis on the utmost importance of sleep and its benefits"
73.1%

much healthier

"if we put old wives in charge of the world it would be a much healthier happier and peaceful place"
73.1%

would wholeheartedly

"would wholeheartedly recommend"
73.1%

amazing study

"this is an amazing study into something we all do but we are not sure why"
73.1%

plain simple the science

"the author has done a great job of explaining plain simple the science behind sleep"
73.0%

physical capabilities

"in turn this has improved my mental health made me more energetic less moody more productive improved my physical capabilities and my skin is the best it has ever been"
73.0%

sleep amazing

"this book really opened my eyes to sleep amazing with lots to take away and apply to your life"
72.9%

lots of info

"lots of info "
72.9%

excellent science

"excellent science"
72.7%

time thanks

"well worth my time thanks"
72.6%

highly recommended

"highly recommended"
72.6%

extremely comprehensive

"extremely comprehensive"
72.5%

pleasure to read

"going to buy this book for many people as their christmas present this year it contains important information we should all be aware of and it was a pleasure to read"
72.5%

even happy

"he says he's happy if you dip into it rather than go end to end and he's even happy if you fall asleep while reading!"
72.5%

profound effect

"while not a self help manual or a how to guide it is having a profound effect on how i approach my life and i find myself recommending it and sharing the findings of it with family friends and policy makers"
72.4%

important information

"matthew walker's writing style is engaging as are his youtube videos and you will learn important information that could literally prevent your life from being prematurely curtailed!"
72.4%

recommend readers

"i recommend readers to buy this book for the purpose of making big change in your life"
72.4%

real benefits

"really fascinating read very impressive information i’ve now changed my sleep patterns and feeling real benefits"
72.4%

subject easy

"fantastic book on the subject easy to read yet provides plenty of scientific examples in backing up the points"
72.2%

airline pilot

"this book was recommended by a work colleague and although i have only just begun reading it i am already discovering some eye watering details about how the inevitable relentless lack of sleep and disturbed sleep encountered in my profession i am a long haul airline pilot is doing my health serious long term damage!"
72.2%

most interesting

"one of the most interesting books i have ever read"
72.1%

amazing read

"amazing read!"
72.1%

healthier life

"what matthew has provided is the hidden side of humanness that helps us to know and understand ourselves better: a new map to find a better destination through deeper and much richer understanding for a healthier life"
71.9%

much better

"i am already sleeping much better"
71.9%

very accessible and easy

"his style of writing is very accessible and easy i recommend this book"
71.8%

such characteristic

"for each such characteristic we typically we see the classical bell curve with different means and distributions for different population groups"
71.6%

academic achievement

"my academic achievement comes much easier"
71.6%

intriguing contents

"intriguing contents written in straightforward language"
71.5%

intimate understanding

"this book written by a sleep scientist who has an intimate understanding of the research is well written informative and at times funny"
71.5%

useful information

"this book is well written and full of useful information"
71.4%

healthy sleep

"plus has common sense and scientificly based tips for maintaining healthy sleep in a world that undervalued sleep"
71.3%

natural process

"i believe it is a really good book especially for those ones who are struggling with falling asleep or waking up many times per night with no reason as me as i see from the contents this book gives you lots of information about sleep itself as a natural process medical approach why do we need it and what happens when we are asleep and also some sort of information about sleep disorders and how to help yourself"
71.1%

recommend this

"highly recommend this brilliantly written common sense and knowledgeable book"
70.9%

light caffeine alcohol

"one other area of focus is the role that artificial light caffeine alcohol and sleeping pills have on the suppression of good quality sleep"
70.9%

relevant and useful

"but still highly recommended and especially his recommendations at the end of the book are very relevant and useful on a personal level and for society at large"
70.8%

most insightful

"most insightful book i've read in ages"
70.6%

very insightful

"this is a great book very insightful and eye opening!"
70.6%

changing improvements

"everyone should read this book so that they can make life and health changing improvements to their sleep!"
70.5%

accessible fascinating

"clearly written accessible fascinating"
70.4%

particular interest

"the effects of fatigue on drivers is of particular interest"
70.4%

heartily recommend

"heartily recommend it"
70.3%

definitely recommend

"i definitely think everyone can learn something from reading this book & i definitely recommend it!"
70.3%

important lessons

"so many important lessons for us all to learn!"
70.3%

favourite read

"i’ve read a few books relating to neurology brain function including ‘do no harm’ by henry marsh which is also a great read but this is by far my favourite read this year so far probably because i can relate to a lot of the material regarding insomnia"
70.2%

understand very clearly

"if like me you are a bad sleeper this book will put the fear of god into you as you will understand very clearly how it’s likely to reduce your lifespan increase your chances of cardiovascular and alzheimer’s diseases"
70.1%

strong and extensive

"it is very well documented and is absolutely back by strong and extensive research"
70.0%

glowing reviews

"i note the huge number of glowing reviews on the book cover and within its introductory pages are written by journalists not scientists"
70.0%

unnecessarily complex

"unnecessarily complex linguistics"
69.9%

human resource policy

"for most industries with the exceptions of firms like google and nasa an upheaval of human resource policy would diminish profits in ways that are difficult to predict"
69.9%

happier and peaceful

"if we put old wives in charge of the world it would be a much healthier happier and peaceful place"
69.8%

slightly wordy

"slightly wordy but very informative"
69.7%

well being

"who knew that sleep plays such an integral part in our overall well being"
69.6%

awesome facts

"full of awesome facts and relevant to absolutely everyone"
69.3%

worth both versions

"i have this in both audio and kindle version well worth both versions"
69.3%
...

terrible damage

"very depressing if you are and insomniac as it tells you all of the terrible damage that has been done to your brain and body for chapter after chapter after chapter"
99.8%

feel terrible

"i do feel it will change my sleeping patterns and when it doesn't it will make me feel terrible about it"
99.6%

extremely boring

"undoubtedly extremely boring"
99.1%

quite repetitive

"this means the whole book is quite repetitive and could have been edited down into a shorter version"
99.1%

very repetitive

"i found the book too scientific and very repetitive"
97.9%

existing anxiety

"if anything reading such books for people with pre existing anxiety could make them feel pretty helpless"
97.2%

worst insomnia

"alas it has also been partly responsible for triggering the worst insomnia of my life"
96.6%

tedious repetitive

"however the book is tedious repetitive and very poorly edited"
96.6%

ptsd anxiety

"it even offers a little guidance for anyone suffering mental health issues such as ptsd anxiety which disrupt sleep"
96.3%

sheer misery

"the sheer misery of being unable to sleep like seasickness you can't die of it but you will wish you could doesn't really get much coverage"
91.2%

entirely unhelpful

"entirely unhelpful book"
89.2%

repetitive time

"could be shorter a bit repetitive time to time but a must read"
89.1%

repetitive content

"sometimes i found the description of the experiments a bit long winded and felt that there was a bit of repetitive content but i was absolutely fascinated the book and its contents and have taken a number of things from it about the importance of a good night's sleep to health happiness and longevity which i am trying to incorporate into my approach to sleep"
88.1%

giving you headaches

"maybe you need glasses or maybe it's your glasses or contact lenses that are making you dizzy and not focused and giving you headaches?"
88.1%

difficult and frustrating

"i thought it would be easy for me to go to bed half an hour earlier and get up half an hour later thus achieving the eight hours sleep that professor walters says i need but in practice it has proved difficult and frustrating to change the seven hour habit of a long lifetime"
87.9%

null hypothesis

"this is known as the null hypothesis"
75.0%

lack of sleep

"made me think a whole new way about sleeping patterns and how lack of sleep affects us"
74.9%

ignore sleep

"ispoiler alertsleep 8 hours a day everyday i wonder why so may of us obsess with nutrition and fitness and ignore sleep"
74.9%

fooling themselves

"i would have discovered that anyone who claims that they function optimally on less than 8 hours per night every night is fooling themselves"
74.9%

lazy or uncaring

"worse we’ve decided along the way that anyone who won’t or can’t live up to them is lazy or uncaring"
74.9%

adverse effects

"matthew walker expertly except explains the science of sleep the adverse effects of not getting enough of it and shares his insights into how a change in society’s attitudes to sleep could help us live longer healthier lives"
74.9%

unnecessary jargon

"the author does something which is particularly outstanding as an expert in his field he's able to effectivley communicate to non experts in a way which is easy to read and isn't filled with unnecessary jargon"
74.9%

neglect sleep

"it illustrates how we as humans tend to neglect sleep and make do with too little of it for nights at a time"
74.9%

little sleep

"but scary too when you discover how downright dangerous it is to have too little sleep!"
74.9%

missing sleep

"if the desired effect was to scare people of missing sleep one chapter would’ve sufficed i also got bored of it trying to convince me of what it already convinced me a few chapters ago missing sleep is bad you keep hoping the book is going to give you some help for the problem it says you had but it just doesn’t"
74.9%

insufficient sleep

"the pernicious effects of insufficient sleep are also covered"
74.8%

almost literally

"overall a fascinating but frustrating read at least for someone who dreams almost literally of being able to follow the author's advice"
74.8%

disrupt sleep

"the information on quite how long caffeine stays in the body and how it acts to disrupt sleep was a real eye opener sorry about the pun and over the last 3 weeks i've avoided caffeine after lunch and have since found it much easier to get to sleep and i sleep better"
74.8%

even worse

"even worse for the scandinavians"
74.8%

late riser

"if my circadian rhythm is hard wired to make me a late riser ie many hours after dawn then i need to deceive my body clock drastically"
74.8%

very noisy

"when i have had mri scans it has been very noisy"
74.8%

chronic insomnia

"as i incorporate changes to my routines lifestyle and environment my chronic insomnia of many years duration is finally getting better!"
74.8%

dripped off the pages

"it flowed and information dripped off the pages"
74.7%

drowsy driving

"from his assertion that drowsy driving is worse than drink driving to his suggestions about how to improve neo natal units to ensure best possible survival of pre term babies this is a book with 'wow' moments"
74.7%

scared the hell

"scared the hell out of wife"
74.7%

miss out on your sleep

"you wouldn't want to miss out on your sleep again after reading this as it's so important"
74.7%

sacrifice sleep

"you can summarise with the general adivise: don’t sacrifice sleep when weighted against something else and try to get as much of it as you can without over thinking it"
74.7%

neurotic life void

"as much as we should head the warnings about circadian rhythm and blue light we should also remember that stressing over every fine detail could lead to a neurotic life void of enjoyment"
74.6%

silly habit

"i am as many of us a bit of sleep deprived for many reasons: children technology early mornings to be at work and silly habit of trying to read books in the bed"
74.6%

term babies

"from his assertion that drowsy driving is worse than drink driving to his suggestions about how to improve neo natal units to ensure best possible survival of pre term babies this is a book with 'wow' moments"
74.6%

particular health risk

"i am at particular health risk if i don't get enough high quality sleep "
74.6%

trouble sleeping

"i’d strongly recommend it to anyone especially those that have trouble sleeping"
74.6%

lost sleep

"you cannot catch up on lost sleep except r"
74.6%

blind panic

"it is exactly as other reviewers have said : it simply sends you into a blind panic about how you'll just die if you do not sleep well"
74.5%

wrong experimentally

"i would then try and prove myself wrong experimentally and statistically"
74.5%

avoid blue screens

"it's a mixture of current accepted wisdom avoid blue screens at night and grandmotherly advice go to bed at the same time each night "
74.5%

side factoid

"as a side factoid i recently read that the world health organisation classifies shift work as a probably carcinogen because such hours mess up your sleep so badly"
74.5%

only problem

"only problem is i find it hard to change to an 8 hour routine or to sleep for that long i was previously more relaxed about my sleep"
74.5%

forced myself

"i forced myself to read through till the end because it’s a timely subject and not many people are talking about it"
74.4%

frankly annoyed

"the only reason it did not get 5 stars was the review of alex guzey which points to some i believe valid inaccuracies which frankly annoyed me"
74.4%

pernicious effects

"the pernicious effects of insufficient sleep are also covered"
74.4%

fiver buying

"throw away all those diet books how to become better books and spend a fiver buying this"
74.4%

threatening illnesses

"quite the opposite in fact therefore to read time and time again that we must get x hours sleep otherwise we will get all sorts of horrible life threatening illnesses is neither helpful nor interesting"
74.4%

under sleep

"and his book is partly an ode to sleep and its virtues and partly a dreadful warning about what happens if individuals and societies continue to under sleep"
74.3%

dying earlier

"the most notable was where he described hunter gatherers dying earlier because they didn't get enough sleep because they spent too much time foraging and not getting enough sleep"
74.3%

unhelpful myths

"it also dispels many unhelpful myths by showing clear conclusions based on rigorous research"
74.3%

darkness sleep

"i would have realised that simon and garfunkel’s lyrics in the sounds of silence about greeting their old friend darkness sleep and “the vision that was planted in my brain still remains” was insightful in highlighting the the key role of sleep in learning and memory"
74.3%

badly written

"an exceptionally boring and badly written book"
74.1%

very poorly

"however the book is tedious repetitive and very poorly edited"
74.0%

catastrophic effects

"matthew walker does not flinch from elucidating the catastrophic effects of consistently not getting enough sleep"
74.0%

throw away

"throw away all those diet books how to become better books and spend a fiver buying this"
73.8%

negative effects

"this book explains why we sleep the positive effects of sleeping in your mind body and health and the negative effects that not sleeping enough has on them"
73.8%

ridiculous parameters

"and another is when without this information the human race has set some ridiculous parameters around when we should sleep & decided they should apply to everyone"
73.8%

state sleep

"he breaks down the roles of the rem dream state sleep and the non dream like state deep sleep which gives an understanding of why each part of the sleep cycle is important for our health"
73.0%

scary stuff

"scary stuff"
72.9%

chronic illnesses

"without sleep expect chronic illnesses to afflict your being and body without sleep expect to be grumpy and not at your best and so on"
72.8%

stay asleep

"the book shows us clearly that some babies & children won’t be able to go to sleep early & stay asleep!"
72.6%

difficult vocabularies

"however for my as a non native english speaker i found that the author used difficult vocabularies on many parts of the book"
72.4%

never questioned

"i had so many aha moments as i learnt about the reasons behind different aspects of sleep which i had experienced but never questioned"
72.4%

given over

"this description is given over and over you start to believe it and say jesus!"
72.3%

edited down

"this means the whole book is quite repetitive and could have been edited down into a shorter version"
72.0%

sleep trouble

"if you are having sleep trouble what's the good of being told how terrible that is without being told how to do something about it?"
71.8%

rather sketchy

"as a result perhaps the promised advice on how to actually sleep better is disappointing and rather sketchy"
71.6%

enough sleep

"lack of enough sleep is implicated in conditions such as cancer alzheimer's and diabetes"
71.4%

three gripes

"i have three gripes"
71.0%

sickening cruelty

"i had nightmares after reading of the sickening cruelty involved in this research"
70.9%

wrong previously

"it’s ludicrous to ignore this knowledge just because we’ve got it wrong previously!"
70.5%

excruciating to read

"he has a tin ear and it’s very excruciating to read"
70.2%

avoided caffeine

"the information on quite how long caffeine stays in the body and how it acts to disrupt sleep was a real eye opener sorry about the pun and over the last 3 weeks i've avoided caffeine after lunch and have since found it much easier to get to sleep and i sleep better"
69.6%

conspicuous absence

"two there is a conspicuous absence of discussion of the situation of people who live in scotland or more northerly latitudes and southern latitudes where the lengths of the day and night vary dramatically over the year and of people whose circumstances affect their sleep parents of young children carers people who have to wake in the night because of a medical condition shift workers etc "
69.3%

sleep problems

"i wouldn't recommend to those who have sleep problems as it is just telling you how bad it is to not get a good night's sleep every night"
69.0%

questions researchers

"i would have thought one of the first questions researchers would ask is how these rhythms differ between the eight hour day an the eighteen hour day that we experience in these latitudes"
69.0%

most neglected

"matthew walker presents the most neglected topic sleep which is fundemental to every individual in the human race in thier maintenance of wellness and sanity in a very readable book"
68.9%

cancer dementia

"the evidence of lack of ability to learn remember make sound decisions and the onset of diabetes heart disease cancer dementia and the destruction of your immune system are all attributed to less than 8 hours sleep per night"
68.7%

somewhat repetitive

"my only criticism was that it was somewhat repetitive and towards the end of the book i had read enough!"
68.1%

much jargon

"too much jargon and detail on experiments and tests"
67.4%

mental health issues

"it even offers a little guidance for anyone suffering mental health issues such as ptsd anxiety which disrupt sleep"
67.2%

unable to sleep

"then the obsession begins you buy a fitbit you track your sleep hours and get frustrated when you can’t get what is deemed to be the minimum sleep time before you know it you’re waking up in the middle of the night unable to sleep because of the anxiety not sleeping enough creates"
67.2%

give it a miss

"if you're a coffee lover maybe give it a miss"
66.4%

cancer alzheimer's

"lack of enough sleep is implicated in conditions such as cancer alzheimer's and diabetes"
66.4%

does he condemn

"the author doesn’t promote over analytics but neither does he condemn it"
66.1%

movement sleep

"but that belies the depth of investigations that have gone into scientific analysis of the brain of the role and mechanism of non rapid eye movement and rapid eye movement sleep and of the consequences of sleep deprivation"
65.9%

worldly preoccupation

"a lot of the advice was the common sense things my parents taught me but were later swamped by the worldly preoccupation with wakefulness and a view that sleeping is a waste of time and life"
65.9%

pretty helpless

"if anything reading such books for people with pre existing anxiety could make them feel pretty helpless"
65.6%

adequate sleep

"i think that the fitness and nutrition industry will or should wise up to the need of adequate sleep"
65.5%

died from alkzeimers

"the fact that margaret thatcher and ronald reagan both died from alkzeimers is attributed to leading lives with less than 6 hours of regular sleep"
65.2%

neglected my sleep hours

"it truly scares me to think that for years i am just about to turn 50 that i neglected my sleep hours thinking that it was the better thing to do"
64.7%

authors views

"another point of contention would be the authors views on slumbers economic benefits"
64.5%

need sleep

"covers every aspect of why we need sleep"
64.5%

mess up your sleep

"as a side factoid i recently read that the world health organisation classifies shift work as a probably carcinogen because such hours mess up your sleep so badly"
64.4%

final quibble

"a final quibble"
64.2%

disturb our daily lives

"also quite terrifying how sleep or a lack of can greatly disturb our daily lives"
64.0%

getting z problem

"it gives you no hope whatsoever just a series of repetitive descriptions of experiments that go like this: we took x amount of healthy young people or mice we sleep deprevided half of them tried for y effect and surprisingly the deprived confirmed that sleeping deprivation causes or increases chances of getting z problem"
64.0%

stages brain function

"as a neuroscientist walker to more than qualified to discuss what is currently understood about sleep stages brain function during sleep and the explanations of why we dream"
64.0%

ignore this knowledge

"it’s ludicrous to ignore this knowledge just because we’ve got it wrong previously!"
63.5%

drum throughout

"bangs the same drum throughout"
63.5%

long winded

"sometimes i found the description of the experiments a bit long winded and felt that there was a bit of repetitive content but i was absolutely fascinated the book and its contents and have taken a number of things from it about the importance of a good night's sleep to health happiness and longevity which i am trying to incorporate into my approach to sleep"
63.4%

major problems

"it puts in your head that if you miss as little as one hour of sleep you risk getting all major problems including cancer and alzheimer you might get fat depressed and it might even ruin your dna"
63.4%

sadly passed

"my friend's mum sadly passed away and her lack of sleep contributed to it"
63.3%

very depressing

"very depressing if you are and insomniac as it tells you all of the terrible damage that has been done to your brain and body for chapter after chapter after chapter"
63.3%

wish you could

"the sheer misery of being unable to sleep like seasickness you can't die of it but you will wish you could doesn't really get much coverage"
63.1%

repetitive descriptions

"it gives you no hope whatsoever just a series of repetitive descriptions of experiments that go like this: we took x amount of healthy young people or mice we sleep deprevided half of them tried for y effect and surprisingly the deprived confirmed that sleeping deprivation causes or increases chances of getting z problem"
62.9%

surprisingly the deprived

"it gives you no hope whatsoever just a series of repetitive descriptions of experiments that go like this: we took x amount of healthy young people or mice we sleep deprevided half of them tried for y effect and surprisingly the deprived confirmed that sleeping deprivation causes or increases chances of getting z problem"
62.6%

struggled with sleep

"i have always struggled with sleep since i was a child"
62.4%

waste products

"basically don't work shifts don't skimp on sleep don't cross time zones all the things we do all the time and it's packed with scientific studies supporting his case including lots of information on how the brain uses sleep to get rid of waste products it doesn't need process information at a deep level and develop new neural pathways"
62.2%

nights sleep

"matthew walker has spent his life time studying sleep and the book is full of evidence from studies that prove that getting a full nights sleep is so important to our health and cognitive functioning"
61.3%

quit alcohol and caffeine

"actually helped me quit alcohol and caffeine due to the effects on sleep and i feel better as a result"
61.2%

even harmful

"we have designed our modern society around a set of non scientific irrelevant & sometimes even harmful ‘rules’ such as ‘working 9 5’ & ‘early start & early finish school times’"
60.3%

late hours

"putting my employer first over my sleep seems so so stupid now even getting up early for exercise and doing chores in the early to late hours to try to get ahead instead of getting into the bedroom to sleep"
60.2%

horrible life

"quite the opposite in fact therefore to read time and time again that we must get x hours sleep otherwise we will get all sorts of horrible life threatening illnesses is neither helpful nor interesting"
59.8%

deprived for years

"it’s made me totally re evaluate the importance of a good night’s sleep and made me realise that i’ve been chronically sleep deprived for years"
59.7%

time zones

"basically don't work shifts don't skimp on sleep don't cross time zones all the things we do all the time and it's packed with scientific studies supporting his case including lots of information on how the brain uses sleep to get rid of waste products it doesn't need process information at a deep level and develop new neural pathways"
59.5%

sleeping problems

"it’s all a bit scary for someone who is prone to sleeping problems"
59.1%

incorrect sleep pattern

"in the daytime every time i forget something or cannot remember where i put something i now put my failure down to an incorrect sleep pattern"
59.0%

routine forever

"this is definitely one of these books that has potential to change your life and routine forever"
59.0%

little predictable in

"it became a little predictable in end but certainly worth a read if you not sure about the importance of sleep"
58.9%

damaged telomeres

"will my damaged telomeres repair themselves in any way for example?"
58.8%

make you worse

"it will just make you worse"
58.8%

very subjective

"however the effect that the book will have on the reader could be very subjective"
58.6%

doom chapters

"there’s some interesting bits here and there but not enough for a whole book and all of the doom chapters don’t help"
58.6%

less convincing

"some of his philosophical reasoning of the evolutionary benefits of various sleep patterns is less convincing"
58.5%

amazed horrified

"i was amazed horrified and inspired by the evidence based facts presented"
58.4%

basis problem

"one basis problem that struck me from the outset and i was expecting to be satisfied before the end"
58.4%

sometimes less optimistic

"are you sometimes less optimistic than you used to be?"
58.3%

blown insomnia

"i thought it would be interesting but actually it just made me feel really anxious about sleeping so much so that i developed full blown insomnia!"
57.9%

forcing people

"this has made me take much more care about my sleep patterns and has really opened my eyes to how society has organised itself to denigrate those who are not natural early birds forcing people into unnatural sleep patterns in order not to lose out in the workplace or at school"
57.9%

there but not enough

"there’s some interesting bits here and there but not enough for a whole book and all of the doom chapters don’t help"
57.5%

alot of fallacies

"it desmythifies alot of fallacies said in current society and shows with fact and numbers based in scientific studies the relationship between cause and effect of the lack of sleep!"
57.3%

diet exercise sleep

"diet exercise sleep"
57.0%

sleep hygiene is poor

"lots of new info about the health benefits or of course the opposite when our sleep hygiene is poor"
56.3%

boring to send you asleep

"really really boring i’m afraid too boring to send you asleep"
56.3%

not predicting a dream

"that is not predicting a dream"
56.3%

just how critical

"one of the most important books i have read about health and just how critical the quality of your sleep is to good health and not just for your brain"
56.2%

premature death

"at my age the particularly powerful wake up call ho ho for me is the much greater chance of premature death even in your sixties"
56.1%

international bestseller

"it's already an international bestseller but i wonder how many people have truly changed their sleeping habits long term as a result?"
55.9%

irrelevant & sometimes

"we have designed our modern society around a set of non scientific irrelevant & sometimes even harmful ‘rules’ such as ‘working 9 5’ & ‘early start & early finish school times’"
55.8%

get lost at times

"this book is not a page turner as much as a chapter turner where there is alot of interest in the chapter information but because of alot of science within the words you can get lost at times"
55.6%

devastating effects

"explains everything very simply and clearly but also the devastating effects of sleep depravation"
55.3%

impact lack

"i never realised the impact lack of sleep can make"
55.3%

detrimental a lack

"very useful for insights to how sleep affects us and also how detrimental a lack of sleep is"
54.9%

falling asleep but

"not very helpful there's a bit here for you if you have trouble falling asleep but not much if your problem is waking up in the night"
54.9%

kills off lots of people

"it is claimed that putting clocks an hour forward or back kills off lots of people but nothing is said about the different length of days of light in many latitudes"
54.8%

too many nonsequiturs

"i'm afraid this book is undermined by too many nonsequiturs"
54.8%

could not sleep the irony

"life changing well written i have been reading it at 3am when i could not sleep the irony is not lost on me"
54.7%

not sleep well

"even when i do manage to be in bed for eight hours i often do not sleep well and suspect i miss out on the essential rem and nrem sleep"
54.7%

nothing about

"we don't realize how important sleep is rather we do realize how important sleep is yet we do nothing about it"
54.7%

n't know about sleep

"i read this the whole book i learnt some things i didn't know about sleep but it hasn't made me go to bed earlier to get the full 8 hours sleep which is why i wanted to read it"
54.7%

found it boring

"i found it boring and it really labours the point that sleep is important"
54.6%

would be even less

"otherwise it would be even less"
54.1%

carry a health warning

"it should carry a health warning"
54.0%

no easy solutions

"sadly there are no easy solutions"
54.0%

pages 30 onwards

"there are about 40 pages of slightly drier scientific stuff from pages 30 onwards but it's important to read them to understand the really good stuff later"
54.0%

which is not the case

"like a couple of places where something drops 4 600% or 200% which is not possible unless you head in the negatives which is not the case"
53.9%

downright dangerous

"but scary too when you discover how downright dangerous it is to have too little sleep!"
53.9%

deprived for many reasons

"i am as many of us a bit of sleep deprived for many reasons: children technology early mornings to be at work and silly habit of trying to read books in the bed"
53.9%

dead already

"how am i not dead already?"
53.9%

addressed very largely

"the author is i venture to suggest a good sleeper and the book is addressed very largely to those who could sleep more if they wanted to"
53.8%

been unknown

"this book whilst you know a lot of do’s and don’ts re sleep the impact in my opinion has been unknown"
53.8%

not a science book

"it is not a science book but rather one that brings the conclusions drawn from the scientific process to the masses"
53.7%

caused to your health

"this book will put the fear of god into you in terms of the amount of sleep you need and the harm that is caused to your health when you don't get it particularly to your long term cognitive function"
53.7%

joe rogan podcast

"listen to the joe rogan podcast with matthew walker then you'll want to read it!"
53.7%

fall asleep

"everytime i try and read it i fall asleep"
53.6%

really boring

"really really boring i’m afraid too boring to send you asleep"
53.4%

dry read graphs

"bit of a dry read graphs and repetitive description"
53.4%

many people

"i forced myself to read through till the end because it’s a timely subject and not many people are talking about it"
53.3%

n't doing enough

"even i felt i wasn't doing enough"
53.2%

exceptionally boring

"an exceptionally boring and badly written book"
53.2%

alarming stats

"three after all the alarming stats there’s nothing to say whether i can make up for my past misdemeanours – can my body mind regenerate at all when given the sleep it needs?"
53.1%

deceive my body clock

"if my circadian rhythm is hard wired to make me a late riser ie many hours after dawn then i need to deceive my body clock drastically"
52.9%

vague and alarmist

"but i must join the critics over some of the reporting which is vague and alarmist without giving enough information to be able to judge how serious the alarms really are"
52.9%

seems so so stupid

"putting my employer first over my sleep seems so so stupid now even getting up early for exercise and doing chores in the early to late hours to try to get ahead instead of getting into the bedroom to sleep"
52.8%

repetitive in places

"it is somewhat repetitive in places but overall very convincing"
52.6%

join the critics

"but i must join the critics over some of the reporting which is vague and alarmist without giving enough information to be able to judge how serious the alarms really are"
52.6%

you sometimes feel dizzy

"do you sometimes feel dizzy?"
52.6%

alex guzey

"the only reason it did not get 5 stars was the review of alex guzey which points to some i believe valid inaccuracies which frankly annoyed me"
52.3%

long and boring

"long and boring!"
52.2%

a little wordy

"some of the writing is a little wordy"
52.2%

worst book

"this is the worst book i have ever read"
52.2%

much coffee

"are you having too much coffee?"
52.0%

getting better

"as i incorporate changes to my routines lifestyle and environment my chronic insomnia of many years duration is finally getting better!"
52.0%

difficult to read

"really interesting topic but i’m finding it difficult to read"
51.9%

full marks

"full marks to the author"
51.9%

you sometimes forgetful

"are you sometimes forgetful?"
51.7%

n't skimp on sleep

"basically don't work shifts don't skimp on sleep don't cross time zones all the things we do all the time and it's packed with scientific studies supporting his case including lots of information on how the brain uses sleep to get rid of waste products it doesn't need process information at a deep level and develop new neural pathways"
51.6%

hunter gatherer ancestors

"then a chapter or two later he goes on how unhealthy we live today by being surrounded by 'blue light and how much better our hunter gatherer ancestors used to sleep because they were'n't exposed to the blue light"
51.5%

unproven opinions

"i was so impressed by his approach & the way he described how the study was first designed & then developed & expanded that i read the book feeling for the first time that i was reading genuine findings & not someone’s unproven opinions"
51.5%

read nothing else

"if you read nothing else"
51.3%

health and wellbeing

"there is not one aspect of health and wellbeing that sleep does not affect not to mention academic and sporting performance"
51.2%

no knowledge of sleep

"perhaps someone with no knowledge of sleep would find it more interesting if they are learning about it for the first time"
51.1%

analytical and hard

"too analytical and hard to get to the crux of the information: there is 1 good chapter with practical info"
50.9%

irresponsible attitude

"our irresponsible attitude towards sleep is terrifying"
50.7%

more northerly latitudes

"two there is a conspicuous absence of discussion of the situation of people who live in scotland or more northerly latitudes and southern latitudes where the lengths of the day and night vary dramatically over the year and of people whose circumstances affect their sleep parents of young children carers people who have to wake in the night because of a medical condition shift workers etc "
50.7%

life of failure

"i feel he rather overstates his case you are given the impression that if you don't get 8 hours and get it every single night you're doomed to a life of failure and mediocrity"
50.6%

falling from 30 000

"the guiness book of records allows free falling from 30 000 ft but now excludes sleep deprivation records as too dangerous"
50.2%
...

Top positive statements

Statement Strength**
"Absolutely fascinating." 100.0%
"Tremendously readable." 98.4%
"Enlightening and interesting." 96.6%
"Factual intriguing and fascinating." 93.5%
"Highly recommend this brilliantly written common sense and knowledgeable book." 93.1%
"Easy to read and absolutely fascinating." 93.1%
"Easy to read and truly enlightening an essential book for everyone." 93.1%
"An inspired read recommended for everyone." 93.1%

Top negative statements

Statement Strength
"Beware though you might lose even more sleep after reading chapter one and wondering what the hell you are doing to your body." 91.0%
"Very depressing if you are and insomniac as it tells you all of the terrible damage that has been done to your brain and body for chapter after chapter after chapter." 89.5%
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Positive mentions

Mentioned Object Mentioned in Strength

Negative mentions

Mentioned Object Mentioned in Strength
Matthews Joe rogan
"after watching Matthews Joe rogan podcast 20 times i had to give this a go"
55.9%
Joe Rogan
"listen to the Joe Rogan podcast with matthew walker then you'll want to read it!"
55.9%

Emotion analysis

Positive tone

Neutral tone

Negative tone

34.0% 21.8% 44.3%
  worry 37.7%
  neutral 21.0%
  happiness 16.2%
  fun 9.0%
  sadness 4.8%
  relief 4.5%
  surprise 1.6%
  enthusiasm 1.1%
  fear 1.1%
  empty 0.8%
  love 0.8%
  joy 0.8%
  hate 0.5%
  anger 0.3%

* analysis performed using Artificial Intelligence (AI) methods, data for the analysis has been gathered from multiple publicly accessible sources.
** strength is the level of sentiment expressed in a sentence, phrase or keyword. It ranges from 0 to 100%
prices and sales statistics are updated daily

last analysis update 2024-03-22