New York Times Bestseller 'An exceptional thriller. It left my nerves jangling for hours after I finished the last page.' -Dennis Lehane, New York Times bestselling author of Shutter Island 'Imagine drifting off every night knowing that your memories will be wiped away by morning. That's the fate of Christine Lucas, whose bewildering internal world is rendered with chilling intimacy in this debut literary thriller. . . . You'll stay up late reading until you know.' -- People (4 stars) Memories define us. So what if you lost yours every time you went to sleep? Your name, your identity, your past, even the people you love-all forgotten overnight. And the one person you trust may be telling you only half the story. Welcome to Christine's life. Every morning, she awakens beside a stranger in an unfamiliar bed. She sees a middle-aged face in the bathroom mirror that she does not recognize. And every morning, the man patiently explains that he is Ben, her husband, that she is