Marshall Seaver is being haunted. In the first installment of this chillingly compelling trilogy, sixteen-year-old Marshall discovers that something beyond our world is after him. The eerie clues pile up quickly, and when people start dying, it's clear whatever this is--it's huge. 
Marshall has no idea what's happening to him, but he's soon convinced that it has something to do with his best friend Cooper, who's been missing for over a week. Together with Coop's sister, Marsh searches for the truth about what happened to his friend, ultimately uncovering something bigger than he could ever have imagined.