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Why We Sleep: Unlocking the Power of Sleep and Dreams Paperback – Illustrated, June 19, 2018

4.7 4.7 out of 5 stars 32,306 ratings

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Why We Sleep is an important and fascinating book…Walker taught me a lot about this basic activity that every person on Earth needs. I suspect his book will do the same for you.” —Bill Gates

A New York Times bestseller and international sensation, this “stimulating and important book” (Financial Times) is a fascinating dive into the purpose and power of slumber.

With two appearances on
CBS This Morning and Fresh Air's most popular interview of 2017, Matthew Walker has made abundantly clear that sleep is one of the most important but least understood aspects of our life. Until very recently, science had no answer to the question of why we sleep, or what good it served, or why we suffer such devastating health consequences when it is absent. Compared to the other basic drives in life—eating, drinking, and reproducing—the purpose of sleep remains more elusive.

Within the brain, sleep enriches a diversity of functions, including our ability to learn, memorize, and make logical decisions. It recalibrates our emotions, restocks our immune system, fine-tunes our metabolism, and regulates our appetite. Dreaming creates a virtual reality space in which the brain melds past and present knowledge, inspiring creativity.

In this “compelling and utterly convincing” (
The Sunday Times) book, preeminent neuroscientist and sleep expert Matthew Walker provides a revolutionary exploration of sleep, examining how it affects every aspect of our physical and mental well-being. Charting the most cutting-edge scientific breakthroughs, and marshalling his decades of research and clinical practice, Walker explains how we can harness sleep to improve learning, mood and energy levels, regulate hormones, prevent cancer, Alzheimer’s and diabetes, slow the effects of aging, and increase longevity. He also provides actionable steps towards getting a better night’s sleep every night.

Clear-eyed, fascinating, and accessible,
Why We Sleep is a crucial and illuminating book. Written with the precision of Atul Gawande, Andrew Solomon, and Sherwin Nuland, it is “recommended for night-table reading in the most pragmatic sense” (The New York Times Book Review).
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Popular Highlights in this book

Editorial Reviews

Review

“A thoughtful tour through the still dimly understood state of being asleep … Why We Sleep is a book on a mission. Walker is in love with sleep and wants us to fall in love with sleep, too. And it is urgent. He makes the argument, persuasively, that we are in the midst of a ‘silent sleep loss epidemic’ that poses ‘the greatest public health challenge we face in the 21st century’ … Why We Sleep mounts a persuasive, exuberant case for addressing our societal sleep deficit and for the virtues of sleep itself. It is recommended for night-table reading in the most pragmatic sense.”
New York Times Book Review

"The director of UC Berkeley's Sleep and Neuroimaging Lab explores the purpose of slumber. Understanding the 'why,' it turns out, just might help you with the 'how to.'"
People

"A neuroscientist has found a revolutionary way of being cleverer, more attractive, slimmer, happier, healthier and of warding off cancer — a good night’s shut-eye ... It’s probably a little too soon to tell you that
Why We Sleep saved my life, but I can tell you that it’s been an eye-opener."
The Guardian

"This is a stimulating and important book which you should read in the knowledge that the author is, as he puts it, 'in love with everything that sleep is and does.' But please do not begin it just before bedtime."
Financial Times

"Fascinating ... Walker describes how our resting habits have changed throughout history; the connection between sleep, chronic disease, and life span; and why the pills and aids we use to sleep longer and deeper are actually making our nights worse. Most important, he gives us simple, actionable ways to get better rest—tonight."
Men's Journal

“Walker is a scientist but writes for the layperson, illustrating tricky concepts with easily grasped analogies. Of particular interest to business owners, educators, parents, and government officials, and anyone who has ever suffered from a poor night’s sleep.”
Library Journal, starred review

"Why We Sleep is simply a must-read. World-renowned neuroscientist and sleep expert Matthew Walker takes us on a fascinating and indispensable journey into the latest understandings of the science of sleep. And the book goes way beyond satisfying intellectual curiosity, as it explores the cognitive, health, safety and business consequences of compromising the quality and quantity of our sleep; insights that may change the way you live your life. In these super-charged, distracting times it is hard to think of a book that is more important to read than this one."
—Adam Gazzaley, co-author of The Distracted Mind, founder and executive director of Neuroscape, and Professor of Neurology, Physiology, and Psychiatry at University of California, San Francisco

“Most of us have no idea what we do with a third of our lives. In this lucid and engaging book, Matt Walker explains the new science that is rapidly solving this age-old mystery.
Why We Sleep is a canny pleasure that will have you turning pages well past your bedtime.”
—Daniel Gilbert, professor of psychology at Harvard and author of Stumbling on Happiness

"In
Why We Sleep, Dr. Matt Walker brilliantly illuminates the night, explaining how sleep can make us healthier, safer, smarter, and more productive. Clearly and definitively, he provides knowledge and strategies to overcome the life-threatening risks associated with our sleep-deprived society. Our universal need for sleep ensures that every reader will find value in Dr. Walker's insightful counsel."
—Mark R. Rosekind, Ph.D., former NHTSA Administrator, NTSB member, and NASA scientist

About the Author

Matthew Walker is a professor of neuroscience and psychology at UC Berkeley, the Director of its Sleep and Neuroimaging Lab, and a former professor of psychiatry at Harvard University. He has published over 100 scientific studies and has appeared on 60 Minutes, Nova, BBC News, and NPR’s Science Friday. Why We Sleep is his first book.

Product details

  • Publisher ‏ : ‎ Scribner; Reprint edition (June 19, 2018)
  • Language ‏ : ‎ English
  • Paperback ‏ : ‎ 368 pages
  • ISBN-10 ‏ : ‎ 1501144324
  • ISBN-13 ‏ : ‎ 978-1501144325
  • Item Weight ‏ : ‎ 2.31 pounds
  • Dimensions ‏ : ‎ 5.5 x 0.92 x 8.38 inches
  • Customer Reviews:
    4.7 4.7 out of 5 stars 32,306 ratings

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Customer reviews

4.7 out of 5 stars
32,306 global ratings

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Customers say

Customers find the book engaging and informative. They appreciate the clear explanations of complex neurological topics and scientific details about the human body's sleep cycle. The book provides insights into the issue of sleep quality and how it impacts memory, immunity, and emotions. Many consider it a worthwhile investment in their health. However, some readers feel the book is boring or redundant towards the end.

AI-generated from the text of customer reviews

801 customers mention "Readability"756 positive45 negative

Customers find the book engaging and informative. They appreciate the writing style, diction, and vocabulary. The book provides details and is a must-read for anyone involved in medicine, education, or ministry.

"...That being said, I found the writing style so engaging (with a few minor instances of excessive detail) and the content so important that I read it..." Read more

"...That was exactly what I did. Reading the book was out of order and focused on topics that interested me most - jetlag, sleeping pills, dreams,..." Read more

"...Facts are the facts, and those presented in this book will change your outlook and appreciation of sleep. It did mine. Worthwhile read." Read more

"...Engaging, insightful, and transformative!" Read more

754 customers mention "Information quality"711 positive43 negative

Customers find the book provides valuable information on sleep and its impact on health. They appreciate the author's clear explanations of complex neurological topics for the layperson. The book covers a wide range of subjects related to sleep quality and importance, making it an excellent resource for health professionals.

"...Walker also describes how dreams foster creativity by establishing connections between distantly related pieces of information stored in the brain...." Read more

"...It was also very enlightening for me to learn that there are a number of factors affecting our sleep, such as the blue night from the LED monitor,..." Read more

"...the benefits of sleep to overall body health and gives substantial experimental evidence to the regenerative benefits of sleep to natural ailments...." Read more

"Tremendously intellectual vocabulary and explanations of brain anatomy and functions makes the book laborious and at the same time extremely..." Read more

570 customers mention "Sleep quality"527 positive43 negative

Customers find the book provides insights into sleep issues and treatment plans for insomnia. They mention it reveals how sleep impacts memory, immunity, and emotions. The book offers clear explanations about good sleep habits like avoiding alcohol and caffeine, keeping a regular bedtime, and the results seem promising.

"...been putting this and his other advice to the test, and the results seem promising." Read more

"...focused on topics that interested me most - jetlag, sleeping pills, dreams, healthy sleep, etc. Part 1. This Thing Called Sleep..." Read more

"...a good reminder of the importance of sleep, a good reference for the scientific benefits of sleep and important tutorial on the health requirements..." Read more

"...and those presented in this book will change your outlook and appreciation of sleep. It did mine. Worthwhile read." Read more

28 customers mention "Value for money"26 positive2 negative

Customers find the book provides an accurate cost-benefit analysis for making sleep a worthwhile investment. They say it's a good buy and worth it for the audio book. While the return on investment through happiness and feeling better pales in comparison to the initial purchase, readers appreciate the health benefits of getting enough sleep and the high health costs of not getting enough.

"...This was a great used deal, and the book arrived good as new. I’d recommend this book to anyone who sleeps (and especially to those who cannot!)." Read more

"...It is incredible. Totally worth the money." Read more

"...The hours you spend reading this book will certainly be a valuable investment into your life, health and general well being." Read more

"...I'm able to make an informed decision and an accurate cost benefit analysis for making sleep a nonnegotiable, at the sacrifice of other things...." Read more

25 customers mention "Anxiety level"20 positive5 negative

Customers find the book thought-provoking and disturbing. They mention that poor sleep can cause physical and mental impairments. The book also explains the connection between sleep and various disorders and diseases.

"...explanations, it reveals how sleep impacts memory, immunity, and emotions while exposing the dangers of sleep deprivation...." Read more

"...The physical and mental impairments caused by one night of bad sleep dwarfs those caused by an equivalent absence of food or exercise...." Read more

"...I have changed my own sleep habits now I dream more, feel younger, happier and enjoying life more...." Read more

"...effects: higher blood pressure and higher heart rate, higher level of stress hormone cortisol, lower degree of growth hormone, increased probability..." Read more

28 customers mention "Boredom"5 positive23 negative

Customers find the book boring and redundant. They feel it's a waste of paper, as the topics are dry and the author overemphasizes the negative effects of lack of sleep.

"...about halfway through the book, but so far I have found the book a little boring and basic...." Read more

"This book was boring. Too many studies and research. It’s good but I just want something straightforward...." Read more

"...It weakens the entire book because the author keeps trying to make the science fit his beliefs instead of letting the science stand on its own...." Read more

"...Although not the most thrilling of books, it doesn’t aim to be. It is stacked with facts and tips in regards to our night time rituals...." Read more

Why We Need Sleeping?
5 out of 5 stars
Why We Need Sleeping?
I got interested in this book because I want to know how I can sleep better. Did I get my questions answered? I would say most of them.The book was written in 4 parts. Readers can read each part individually without following the order. That was exactly what I did. Reading the book was out of order and focused on topics that interested me most - jetlag, sleeping pills, dreams, healthy sleep, etc.Part 1. This Thing Called SleepWhat I liked most about this book is how it dispelled the myths about sleeping. Let's start with sleeping pills. Most of the sleeping pills on the market are based on Melatonin. Basically, it helps regulate the timing of when sleep occurs, i.e., it does not put you to sleep. Taking melatonin for jet lag does not guarantee we will be able to sleep, but the timing signal significantly increases the likelihood of sleep. Another misconception is that taking alcoholic drinks before sleep will help us sleep better. It turns out that it has the opposite effect.Part 2. Why Should You SleepI used to hear stories about great people who only slept a few hours every day, so they got a lot more things done versus the ordinary folks. However, even people such as Bill Gates are saying that now, having 8 hours of sleep is important. Sleep deprivation can be a serious problem. Workers will lose productivity if they do not get enough sleep, and it may affect their health as their immune system is weakened. A more serious scenario is when we do not have enough sleep, and we are driving.Part 3. How and Why We DreamI always try to interpret a dream, especially a scary one, and find out what it means. The author looked at dreams from a scientific standpoint. It's almost like fortune telling when we try to figure out the meaning of a dream. However, with the experimental data collected, they were able to show that people get more creative and are able to solve tough problems during their dreams. He cited examples from well-known people such as Thomas Edison and Paul McCartney. Very interesting findings. I need to dream more so I can be more creative!Part 4. From Sleeping Pills to Society-TransformedThis is the part I enjoyed most, as it answered most of my questions. With modern society, we have more and more distractions every day. In addition to computers at work and at home, we have many electronic gadgets such as iPads, cell phones, iWatch, etc. And it is actually not healthy to spend so much time on these electronic devices before going to bed. It was also very enlightening for me to learn that there are a number of factors affecting our sleep, such as the blue night from the LED monitor, the temperature, and lighting in our bedroom, etc.The author stated clearly at the beginning of his book that it is not designed to be a self-help guide, and it's not written to target or treat sleep disorders. However, he did include an appendix, "Twelve Tips for Healthy Sleep."The book speaks with data and facts. I learned a lot from it, and I thoroughly enjoyed reading this book. On the other hand, for folks not interested in all the details of the experimental data, you can still get a lot of good insights from the book.
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Top reviews from the United States

  • Reviewed in the United States on June 25, 2023
    "I was once fond of saying, 'Sleep is the third pillar of good health, alongside diet and exercise.' I have changed my tune. Sleep is more than a pillar; it is the foundation on which the other two health bastions sit. Take away the bedrock of sleep, or weaken it just a little, and careful eating or physical exercise become less than effective, as we shall see."

    ― from “Why We Sleep: Unlocking the Power of Sleep and Dreams”

    Matthew Walker's "Why We Sleep" is one of the two most important books I have read in my life1. Having done a little stock trading along with having survived several tech industry "death marches," things which are quite antithetical to good sleep, I had little idea just how destructive to your health lack of sleep is. A few years back, however, I began to hear that lack of sleep was correlated with diseases such as Alzheimer's, but this did not strike me as convincing since correlation is not causation. Indeed, a little later, I heard about this book at work but was somewhat ambivalent. It's just going to tell me that doctors think sleep is essential but are vague as to why were my thoughts.

    Luckily I noticed an episode of Sam Harris's podcast "Making Sense" in which he interviewed Walker. Since Sam Harris is a figure whose judgment I highly respect, and I know he is very discerning about whom he invites on as guests, I decided there was probably more of value to say about sleep than I initially thought.

    Correlation and Causation

    Walker's book makes a compelling case that sleep is the bedrock of good health. He convincingly demonstrates that lack of good sleep can lead to downward spirals in health with the development of health conditions that make it hard to sleep, leading to more serious health conditions due to lack of sleep, making it even harder to sleep… and so on into a vicious cycle. Walker is careful to lay out in detail when the causal mechanisms are well understood, as in the case of Alzheimer's and cancer, and when lack of sleep is currently a suspect, although the exact causal mechanism has yet to be established. By the end of the book, I realized, however, that sleep is so foundational that even a mere correlation to some bad health condition is enough to make lack of good sleep a prime suspect worth considering as a cause.

    Organization and Style

    According to Walker, "Why We Sleep" is organized so that later chapters can be read without a strict need to read earlier ones first. Thus, if you use sleeping pills and want to know why you should not, he says it is okay to and, indeed, encourages you to jump to that section right away. That being said, I found the writing style so engaging (with a few minor instances of excessive detail) and the content so important that I read it straight through. Having read it this way, my sense was that the book frontloads its most important content: It explains in detail, with specifics such as the chemicals involved, why you feel more tired at certain parts of the day than others. To give you the motivation to get good sleep, the deleterious effects of lack of sleep also come near the beginning of the book.

    The Enormous and Far-Ranging Effects of Poor Sleep

    The effects of lack of sleep go beyond just affecting your physical health, however, and Walker shows just how destructive lack of sleep will be on your ability to learn new things. One of the most remarkable findings is that you need to get good sleep after learning new information. You cannot even get a single night of suboptimal sleep the first night, or some information will be lost permanently.

    Conversely, if you get that first night of good sleep after learning something new, sleep on subsequent nights will continue to solidify what you have learned: all while you sleep! This is just one case where Walker details how, unfortunately, missed sleep cannot be well compensated for by more sleep later: Permanent losses are involved.

    Dreams

    Some of the most fascinating information in the book is on the role of dreams. Here we learn of their therapeutic qualities, including some of the underlying biochemistry involved. Discoveries here have led to a better understanding of PTSD, including better treatment methods. Walker also describes how dreams foster creativity by establishing connections between distantly related pieces of information stored in the brain. Here Walker includes a particularly fascinating anecdote of how Edison enhanced his creativity by waking himself from naps and immediately recording his thoughts.

    Empathy For Different Circadian Rhythms

    Throughout the book, Walker emphasizes how what we have learned about sleep has implications for how we should view people who may not have what seem like "normal" sleep patterns more empathetically. In particular, he emphasizes that teenagers want to get up and go to bed later, not due to laziness but because they run on a different circadian rhythm. It is something that is biologically hardwired into them. A consequence is that forcing school start times incompatible with this has devastating effects on how well they learn compared to well they could. Similar facts are true of people who are naturally "night owls" and run on different circadian rhythms than the rest of us.

    Minor Flaws

    Walker's book has only a few minor flaws:

    1. Although he provides an excellent explanation of why most sleeping pills should be avoided, he does not mention whether this includes melatonin.

    2. His discussion of the nationwide dollar impacts of poor sleep could be better presented. The unfortunate truth is that given the numbers we have heard spent on wars and, especially, financial bailouts and stimulus, rattling off numbers that are “merely” in the hundreds of millions or even low billions hits us in a place we are now numb.

    3. Although Walker's discussion of creativity in the dream state and the state when just waking from dreams is a fascinating part of the book, I would have liked to see some discussion of how objectively accurate intuitions are during these moments. Anecdotally, I used to joke that my best ideas came to me during this time or not at all. Sometimes, however, the thoughts just turned out to be overconfident upon more profound reflection. Is that true for just me, or is it true for people, generally speaking?

    Conclusion

    Overall, Walker's "Why We Sleep" is a must-read for anyone who sleeps: in other words, everyone. This book will not only absolve you of any guilt associated with prioritizing sleep, but it will also arm you with the knowledge to make the best choices for your physical and mental health. Walker guides you through the critical benefits of sleep, from its integral role in memory and creativity to its power to process and put to rest the day's experiences: especially the more troubling ones.

    While the damaging effects of lack of sleep seem exponential, Walker argues that some of the most significant benefits come in the final two hours. Thus getting eight full hours of sleep is crucial. After reading this book, you will not want to miss a full night's sleep again.

    To help you achieve a full night's sleep regularly, Walker provides 12 concrete steps in an appendix. Some of these suggestions are initially counterintuitive. For example, Walker maintains that a cooler room temperature of around 65F is best for optimal sleep. Already, I've been putting this and his other advice to the test, and the results seem promising.
    127 people found this helpful
    Report
  • Reviewed in the United States on August 11, 2024
    I got interested in this book because I want to know how I can sleep better. Did I get my questions answered? I would say most of them.

    The book was written in 4 parts. Readers can read each part individually without following the order. That was exactly what I did. Reading the book was out of order and focused on topics that interested me most - jetlag, sleeping pills, dreams, healthy sleep, etc.

    Part 1. This Thing Called Sleep
    What I liked most about this book is how it dispelled the myths about sleeping. Let's start with sleeping pills. Most of the sleeping pills on the market are based on Melatonin. Basically, it helps regulate the timing of when sleep occurs, i.e., it does not put you to sleep. Taking melatonin for jet lag does not guarantee we will be able to sleep, but the timing signal significantly increases the likelihood of sleep. Another misconception is that taking alcoholic drinks before sleep will help us sleep better. It turns out that it has the opposite effect.

    Part 2. Why Should You Sleep
    I used to hear stories about great people who only slept a few hours every day, so they got a lot more things done versus the ordinary folks. However, even people such as Bill Gates are saying that now, having 8 hours of sleep is important. Sleep deprivation can be a serious problem. Workers will lose productivity if they do not get enough sleep, and it may affect their health as their immune system is weakened. A more serious scenario is when we do not have enough sleep, and we are driving.

    Part 3. How and Why We Dream
    I always try to interpret a dream, especially a scary one, and find out what it means. The author looked at dreams from a scientific standpoint. It's almost like fortune telling when we try to figure out the meaning of a dream. However, with the experimental data collected, they were able to show that people get more creative and are able to solve tough problems during their dreams. He cited examples from well-known people such as Thomas Edison and Paul McCartney. Very interesting findings. I need to dream more so I can be more creative!

    Part 4. From Sleeping Pills to Society-Transformed
    This is the part I enjoyed most, as it answered most of my questions. With modern society, we have more and more distractions every day. In addition to computers at work and at home, we have many electronic gadgets such as iPads, cell phones, iWatch, etc. And it is actually not healthy to spend so much time on these electronic devices before going to bed. It was also very enlightening for me to learn that there are a number of factors affecting our sleep, such as the blue night from the LED monitor, the temperature, and lighting in our bedroom, etc.

    The author stated clearly at the beginning of his book that it is not designed to be a self-help guide, and it's not written to target or treat sleep disorders. However, he did include an appendix, "Twelve Tips for Healthy Sleep."

    The book speaks with data and facts. I learned a lot from it, and I thoroughly enjoyed reading this book. On the other hand, for folks not interested in all the details of the experimental data, you can still get a lot of good insights from the book.
    Customer image
    5.0 out of 5 stars Why We Need Sleeping?
    Reviewed in the United States on August 11, 2024
    I got interested in this book because I want to know how I can sleep better. Did I get my questions answered? I would say most of them.

    The book was written in 4 parts. Readers can read each part individually without following the order. That was exactly what I did. Reading the book was out of order and focused on topics that interested me most - jetlag, sleeping pills, dreams, healthy sleep, etc.

    Part 1. This Thing Called Sleep
    What I liked most about this book is how it dispelled the myths about sleeping. Let's start with sleeping pills. Most of the sleeping pills on the market are based on Melatonin. Basically, it helps regulate the timing of when sleep occurs, i.e., it does not put you to sleep. Taking melatonin for jet lag does not guarantee we will be able to sleep, but the timing signal significantly increases the likelihood of sleep. Another misconception is that taking alcoholic drinks before sleep will help us sleep better. It turns out that it has the opposite effect.

    Part 2. Why Should You Sleep
    I used to hear stories about great people who only slept a few hours every day, so they got a lot more things done versus the ordinary folks. However, even people such as Bill Gates are saying that now, having 8 hours of sleep is important. Sleep deprivation can be a serious problem. Workers will lose productivity if they do not get enough sleep, and it may affect their health as their immune system is weakened. A more serious scenario is when we do not have enough sleep, and we are driving.

    Part 3. How and Why We Dream
    I always try to interpret a dream, especially a scary one, and find out what it means. The author looked at dreams from a scientific standpoint. It's almost like fortune telling when we try to figure out the meaning of a dream. However, with the experimental data collected, they were able to show that people get more creative and are able to solve tough problems during their dreams. He cited examples from well-known people such as Thomas Edison and Paul McCartney. Very interesting findings. I need to dream more so I can be more creative!

    Part 4. From Sleeping Pills to Society-Transformed
    This is the part I enjoyed most, as it answered most of my questions. With modern society, we have more and more distractions every day. In addition to computers at work and at home, we have many electronic gadgets such as iPads, cell phones, iWatch, etc. And it is actually not healthy to spend so much time on these electronic devices before going to bed. It was also very enlightening for me to learn that there are a number of factors affecting our sleep, such as the blue night from the LED monitor, the temperature, and lighting in our bedroom, etc.

    The author stated clearly at the beginning of his book that it is not designed to be a self-help guide, and it's not written to target or treat sleep disorders. However, he did include an appendix, "Twelve Tips for Healthy Sleep."

    The book speaks with data and facts. I learned a lot from it, and I thoroughly enjoyed reading this book. On the other hand, for folks not interested in all the details of the experimental data, you can still get a lot of good insights from the book.
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    15 people found this helpful
    Report

Top reviews from other countries

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  • Oscar Fdez
    5.0 out of 5 stars El valor del sueño
    Reviewed in Mexico on December 15, 2024
    Excelente libro para terminar de entender la importancia del sueño y los procesos para los que ayuda cuidar la cantidad de horas que domirmos y lo mucho que nos afecta no hacerlo. Totalmente recomendable.
  • robertmtoronto
    5.0 out of 5 stars Buy this book now:Don’t sleep on it.
    Reviewed in Canada on November 27, 2024
    An outstanding book of researched based knowledge about how profound sleep is to our existence. Clearly written, with beautiful explanations and examples, it is simply the best book that explains one- third of our existence. I’ve studied the practical side of neuroscience for over 20 years. This book is the missing link that rounds out what we know about the brain.
  • Mauricio Antonio Tamer
    5.0 out of 5 stars Everybody shall read it
    Reviewed in Brazil on January 17, 2024
    Life changing book. You will learn why to sleep, including a very consistent and technical answer. After reading this book, for sure, you will learn how to improve many areas of your life.
  • lilie
    5.0 out of 5 stars excellent livre
    Reviewed in France on December 6, 2024
    Ce livre est important a lire et avoir dans sa bibliotheque afin de comprendre l'importance vital du sommeil sur la qualite de vie des heures éveillées . A lire absoluement a partir de l'adolescence . Cela aura un impact sur le reste de la vie je recommande ce livre
  • alesza
    5.0 out of 5 stars Interessantes Buch
    Reviewed in Germany on October 23, 2024
    Sehr informativ und interessant. Der Autor erzählt nicht zu wissenschaftlich und abgehoben, sondern alle seine Beispiele und Erklärungen sind sehr einleuchtend und verständlich beschrieben. Sehr zu empfehlen!