An ordinary snapshot causes a mother's world to unravel in #1 New York Times bestselling author Harlan Coben's shocking thriller. When Grace Lawson picks up a newly developed set of family photographs, there is a picture that doesn't belong-a photo from at least twenty years ago with a man in it who looks strikingly like her husband, Jack. And though Jack denies it's him, he disappears that night, taking the photo with him. Now, to save her family...