"A taut, evocative thriller that's surprising to the last page." --Karen M. McManus, New York Times bestselling author of One of Us Is Lying There's no hiding on a cruise ship-not even from yourself. Natalie's parents are taking her and her three best friends on a cruise for her seventeenth birthday. A sail -a-bration, they call it. But it's only been a few short months since Natalie's boyfriend died in a tragic accident, and she wants to be anywhere...