In the days leading up to Halloween, Harper is hired by a university research group attempting to create an artificial poltergeist. The head researcher suspects someone is faking the phenomena, but Harper's investigation reveals something else entirely: the group has succeeded. When one of the group's members is found dead in a brutal and inexplicable fashion, Harper must determine whether the killer is the ghost itself, or someone all too human....

For Seattle investigator Harper Blaine, her own case may prove the most difficult to solve. Why did she--as opposed to others with near-death experiences--become a Greywalker? When she begins digging into her own past, she unearths some unpleasant truths about her father's early death as well as a mysterious puzzle. She sets out to find his ghost, but encounters only a void where he should be, leaving her with more unanswered questions.--From publisher's...

Harper Blaine is on the mend, but evil never rests-in the latest novel from the national bestselling author of Labyrinth . After being shot in the back and dying-again- Greywalker Harper Blaine's only respite from the chaos is her work. But while conducting a pre-trial investigation in the Olympic Peninsula, she sees a ghostly car accident whose victim insists that he was murdered and that the nearby community of Sunset Lakes is to blame. Harper soon...