The #1 New York Times BestsellerWinner of the Edgar AwardPublishers Weekly and USA Today BestsellerMillions of Copies SoldQuentin Jacobsen has spent a lifetime loving the magnificent Margo Roth Spiegelman from afar. So when she cracks open a window and climbs back into his life-summoning him for an ingenious campaign of revenge-he follows. When their all-nighter ends and a new day breaks, Margo has disappeared. But Q soon learns that there are clues-and they're for him. Embarking on an exhilara