The author of The Willpower Instinct delivers a controversial and groundbreaking new book that overturns long-held beliefs about stress. More than forty-four percent of Americans admit to losing sleep over stress. And while most of us do everything we can to reduce it, Stanford psychologist and bestselling author Kelly McGonigal, Ph.D, delivers a startling message: Stress isn't bad. In The Upside of Stress, McGonigal highlights new research indicating that stress can, in fact, make us stronger