From the New York Times bestselling author of The Couple Next Door, a thriller featuring a suspicious accident, a wife who can't account for herself, and unsettling questions that threaten to tear the couple apart.Karen and Tom Krupp are happy. They have a lovely home in upstate New York, they're practically newlyweds, and they have no kids to interrupt their comfortable life together. But one day, Tom returns home to find Karen has vanished--her car's gone and it seems she l