“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...

This guide provides information on evaluating one's own risk of developing osteoarthritis, explains how to prevent its onset, and gives sound guidelines for lessening its effects. Real-life anecdotes and a question-and-answer section are included.