Worried about their 16-year-old son after his classmate's suicide, his parents install a spy program on his computer. They worry even more when they see a cryptic message to "stay quiet." And when he vanishes, it's clear that something sinister has infected the community. Is there a connection between one boy's death and another's disappearance? A 2008 Publishers Weekly Best Book. "Unnerving [and] frightening."—Publishers Weekly