Customer Review

Reviewed in the United States on October 7, 2017
I'm about 75 pages into this book and it is already one of the most fascinating, important, and engaging books I've ever read. And it's funny, too, which was unexpected. This should be required reading by EVERYONE. After you read this book, I can't imagine how you could not prioritize getting an 8-hour night of sleep every night. Some astounding facts:
-Routinely sleeping less than 6 or 7 hours a night increases your risk of cancer by 50%.
-Every species every studied, preceding the emergence of vertebrates even, sleeps. Some species can sleep with only half their brain (!!). Sleep is an incredibly risky thing for an animal to do because you are completely vulnerable to predators when you sleep. But sleep is THAT important that it was preserved by evolution.
-After even one night of less than 5 hours of sleep, natural killer cells (which kill cancer cells that appear in your body EVERY DAY) drop by 70%. Just one night!!!
Buy it, read it, and then share it with everyone you know.
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4.7 out of 5 stars
4.7 out of 5
12,015 global ratings