Hold Tight by Harlan Coben in Hardcover

Tight promises to be the most talked. bout thriller in decades. Tia and Mike Baye never imagined they'd spy on their kids. But their sixteen-year-old son Adam has been unusually distant lately, and after the suicide of his best friend Spencer Hill, they can't help but worry. Within days of installing a sophisticated spy program on Adam's computer, they are jolted by a cryptic message from an unknown correspondent that shakes them to their core: "Just stay quiet and all safe."