Demon Theory

Demon Theory is a novel written by Native American author Stephen Graham Jones. Written like a screenplay, it was published in 2006.
Plot summary.
On Halloween night, following an unnerving phone call from his diabetic mother, Hale and six of his med school classmates return to the house where his sister disappeared years ago. While there is no sign of his mother, something is waiting for them there, and has been waiting a long time. Written as a literary film treatment littered with footnotes and experimental nuances, Demon Theory is even parts camp and terror, combining glib dialogue, fascinating pop culture references, and an intricate subtext as it pursues the events of a haunting movie trilogy too real to dismiss. There are books about movies and movies about books, and then there’s Demon Theory – a refreshing and occasionally shocking addition to the increasingly popular “intelligent horror” genre.
Motifs.
The novel/screenplay explores a long list of normal and bizarre subject matters, including demons, angels, gargoyles, familial dysfunction, guilt, trust, and sanity.