'What a box of tricks! This full-throttle thriller, dark and driving, rivals Agatha Christie for sheer ingenuity and James Patterson for flat-out speed. Swift, sharp, and relentless.'-- A. J. Finn, #1 New York Times bestselling author of The Woman in the Window A brilliant, edgy thriller about four strangers, a blizzard, a kidnapped child, and a determined young woman desperate to unmask and outwit a vicious psychopath. A kidnapped little girl locked in a stranger's van. No help for miles. What would you do? On her way to Utah to see her dying mother, college student Darby Thorne gets caught in a fierce blizzard in the mountains of Colorado. With the roads impassable, she's forced to wait out the storm at a remote highway rest stop. Inside are some vending machines, a coffee maker, and four complete strangers. Desperate to find a signal to call home, Darby goes back out into the storm . . . and makes a horrifying discovery. In the back of the van parked next to her car, a little girl