4.29 AVERAGE


My experience with a lot of nonfiction like this is that there's not enough to fill an entire book--that the article or interview would have been sufficient.

But not so with Walker's book. I found this book endlessly fascinating, and Walker's voice (though a tad corny) entertaining.

It's rare that a book genuinely changes my habits, and maybe my life, but this one of the few. If you've every struggled with insomnia, I highly recommend this book.
informative reflective medium-paced
informative medium-paced
adventurous challenging emotional hopeful informative inspiring fast-paced

Expand filter menu Content Warnings

As far as I can tell, in order to write a review it was necessary to select a star rating. However, this is one of the first books I've read that my preference was to give zero stars; not because of the quality of the contents or writing, simply because it's not a book I would rank. Beyond any shadow of doubt, Matthew Walker makes the case for the importance, necessity, indeed, life-affirming reasons for sleep.

Walker is an enjoyable writer to read, deftly combining facts, figures and research studies with 'plain English.' He makes the science and research of sleep interesting and accessible. With that said, I did not - could not - finish his book. At some point it felt like I was being hit over the head with a hammer that kept striking at the same spot, and I wanted to scream: enough!

Before opening the book I was already a believer in the need for sleep, typically sleeping 8 hours a night, sometimes even 9. Through helpful graphs I saw how the brain cycles through NREM (not REM) and REM (rapid eye movement) sleep throughout the night. Walker likens NREM sleep as a time of reflection on the new information taken in during the day and REM sleep as a time of integration where that new information is linked to existing information. Also during NREM sleep the brain is bathed in cerebrospinal fluid, which essentially is like cleaning the filters on the air conditioner. This is an important nightly chore that, if not accomplished, can cause gunk (my non-scientific term) to build up in the brain, just like mold, dust and other debris can build up on a filter and cause it to perform poorly.

Athletes, students, and parents of both will find much of use in the early chapters of the book, as well as anyone who drives a car, runs a business, studies for tests…. Sleep matters. Insufficient sleep takes a toll no matter the activity.

Nonetheless, while it was definitely eye-opening to be exposed to the science and biology of what happens during sleep, it was equally down-heartening to read the chapters delineating the impact of insufficient and poor sleep on cancer, heart health, life span, Alzheimer's, and diabetes.

He lists Twelve Tips for Healthy Sleep in the Appendix, a reprint from the National Institute of Health's 2012 magazine, page 20. If you are interested in improving your sleep, these might be sufficient. However, if you want to get the full sense of why sleep matters or are simply not convinced of its importance, then I would absolutely recommend reading this book. What you learn might just make a difference in the quality of your life.

1. Stick to a sleep schedule.
2. Exercise, just not too late in the day.
3. Avoid caffeine and nicotine.
4. Avoid alcohol before bed.
5. Avoid large meals and beverages late at night.
6. Where possible, avoid medicines that delay or disrupt sleep.
7. No napping after 3:00 in the afternoon.
8. Relax before bed.
9. A hot bath before bed helps drop body temperature and promotes relaxation.
10. Set your bedroom up to be dark, cool, and free of gadgets.
11. During the day get sufficient exposure to sunlight.
12 Don't remain in bed if you are tossing and turning for 20 minutes and unable to fall asleep.

In terms of usefulness I wish I’ve read this book years ago.
However for me, parts of this boom were just a bit boring. Like some of the details on the experiments. I felt that did not add any value.
But other than that excellent stuff and should be highly recommended reading for anyone and everyone.

Life-changing book, fantastic combination of hard science with anecdotes and real life studies showing real effects. I am so thankful to have read this and it has shown me how important sufficient and good-quality sleep is to my health and that of those around me.
Cannot recommend enough.
informative medium-paced
informative medium-paced

This is probably the best nonfiction book I have ever read. It is so informative and has so much good data and research to back it up. Honestly, I literally could not recommend this more. Everyone should read this.