Why we sleep

"In this . . . book, [the author] provides an . . . exploration of sleep, examining how it affects every aspect of our physical and mental well-being. Charting . . . scientific breakthroughs, and marshalling . . . decades of research and clinical practice, [he] 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"--Amazon.