Merry Barrett is 8 years old when her older sister, Marjorie, begins to exhibit signs of mental illness. Believing she may be possessed by a demon, the Barrett family employs the help of a priest to perform an exorcism. Since the family is also in need of money, they agree to allow this part of their lives to be made into a reality show. Part horror and part psychological suspense, Paul Tremblay's A Head Full of Ghosts borrows elements from classic horror novels like The Exorcist and The Shining. Told by an unreliable narrator (Merry was 8 years old when events occurred) and including some twists and turns- it also borrows elements from modern psychological thrillers. Highly recommended for fans of horror and psychological thrillers.