Why We Sleep
Unlocking the Power of Sleep and Dreams
A sleep scientist explains why sleep is the single most effective thing we can do for our health, and what happens without it.
Neuroscientist Matthew Walker makes the scientific case that sleep is not a luxury but a biological necessity, as vital as food and more powerful than almost any medicine. Drawing on decades of research, he explains how sleep sharpens memory, regulates emotion, and protects against disease, and warns of the quiet epidemic of sleep deprivation in modern life. Practical and alarming in equal measure, it changed how many readers treat their nights. Bill Gates reviewed it warmly on Gates Notes.
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