This cracking thriller from Harlan Coben is now published in its mass market edition, having already topped the "Sunday Times" bestseller list in hardback. Tia & Mike Baye are worried about their son following the suicide of his classmate. When a disturbing message appears on his computer, and the dead boy's mother finds a photo taken on the day of his death, it is clear that something deep and sinister has infected their lives. Just how far will parents go to protect their kids?