A chilling, riveting, heartbreaking (The New York Times Book Review) novel of parental turmoil, from Matt Haig, the #1 New York Times bestselling author of The Midnight Library and How to Stop Time.

Terence Cave, owner of Cave Antiques, has already experienced the dual tragedies of his mother’s suicide and his wife’s murder when his teenage son, Reuben, is killed in a grotesque accident. His remaining child, Bryony, has always been the family’s golden girl and Terence comes to realize that his one duty in life is to protect her from the world’s dark forces. But as he starts to follow his grieving daughter’s movements and enforce a draconian set of rules, his love for Bryony becomes a possessive force that leads to destruction.

The Possession of Mr. Cave is a chilling investigation into the relationship between adults and teenagers – and a captivating, tautly paced story that chronicles one man’s descent into madness.