TIME The Science of Sleep: How Rest Works Wonders, What Kids Need, and The New Dream Therapy

TIME reveals the cutting-edge science of sleep: why you need it, what happens when you do it—and what happens to your body and brain when you don't. Learn how to squash nightmares and dream yourself to better mental health; uncover how to improve your metabolism and weight through rest; discover which sleep apps can actually help you; and find out why you should be wary of sleeping pills. Finally, you'll also get the nine new sleep rules—a recipe for the best night's sleep of your life.