A chilling thriller that brilliantly blends psychological suspense and supernatural horror, reminiscent of Stephen King's The Shining, Shirley Jackson's The Haunting of Hill House and William Peter Blatty's The Exorcist.

The lives of the Barretts, a suburban New England family, are torn apart when 14-year-old Marjorie begins to display signs of acute schizophrenia. To her parents despair, the doctors are unable to halt 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, 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 the terrifying events that took place when she was just eight years old, long-buried secrets and painful memories begin to surface and a mind-bending tale of psychological horror is unleashed.

'Whether psychological or supernatural, this is a work of deviously subtle horror.' - Publishers Weekly

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

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