"Terrific. . . . Generates a haze of an altogether more serious kind: the pleasurable fog of calculated, perfectly balanced ambiguity."--New York Times Book Review

The lives of the Barretts, a normal suburban New England family, are torn apart when fourteen-year-old Marjorie begins to display signs of acute schizophrenia.

To her parents' despair, the doctors are unable to stop Marjorie's bizarre outbursts and subsequent descent into madness. As their home devolves into a house of horrors, they reluctantly turn to a local Catholic priest for help. Father Wanderly suggests an exorcism; he believes the vulnerable teenager is the victim of demonic possession. He also contacts a production company that is eager to document the Barretts' plight for a reality television show. With John, Marjorie's father, out of work for more than a year and medical bills looming, the family reluctantly agrees to be filmed--never imagining that The Possession would become an instant hit. When events in the Barrett household explode in tragedy, the show and the incidents it captures become the stuff of urban legend.

Fifteen years later, a bestselling writer interviews Marjorie's younger sister, Merry. As she recalls those long-ago events from her childhood--she was just eight years old--painful memories and long-buried secrets that clash with the television broadcast and the Internet blogs begin to surface.

"Gripping and suspenseful--[Tremblay's] ultimate, bloodcurdling revelation is as sickeningly satisfying as it is masterful."--NPR Books

Winner of the 2015 Bram Stoker Award, a brilliant novel of psychological horror--and demonic possession?--from the nationally bestselling author of The Cabin at the End of the World, Survivor Song, and The Pallbearers Club.

"A Head Full of Ghosts scared the living hell out of me, and I'm pretty hard to scare." -- Stephen King

The lives of the Barretts, a normal suburban New England family, are torn apart when fourteen-year-old Marjorie begins to display signs of acute schizophrenia.

To her parents' despair, the doctors are unable to stop Marjorie's descent into madness. As their stable home devolves into a house of horrors, they reluctantly turn to a local Catholic priest for help. Father Wanderly suggests an exorcism; he believes the vulnerable teenager is the victim of demonic possession. He also contacts a production company that is eager to document the Barretts' plight. With John, Marjorie's father, out of work for more than a year and the medical bills looming, the family agrees to be filmed, and soon find themselves the unwitting stars of The Possession, a hit reality television show. When events in the Barrett household explode in tragedy, the show and the shocking incidents it captures become the stuff of urban legend.

Fifteen years later, a bestselling writer interviews Marjorie's younger sister, Merry. As she recalls those long-ago events that took place when she was just eight years old, secrets and painful memories that clash with what was broadcast on television begin to surface--and a mind-bending tale of psychological horror is unleashed, raising vexing questions about memory and reality, science and religion, and the very nature of evil.