A Head Full of Ghosts is a horror novel by Paul Tremblay, themes include elements of which term used for the use of exorcism in the Roman Catholic faith for those who are believed to be the victims of demonic possession?
A Head Full of Ghosts:  Themes include elements of Catholic exorcism and reality television exploitation. Exorcism in the Catholic Church: Exorcism in the Catholic Church is the use of exorcism in the Roman Catholic faith for those who are believed to be the victims of demonic possession.
Exorcism in the Catholic Church