The Exorcist Code by William Massa

A demonic serial killer is slaughtering exorcists.To stop it, the Vatican unveils its ultimate weapon: Michael, a soulless android immune to possession, fluent in sacred ritual, and engineered to be the ultimate exorcist.Assigned to monitor him is Father Callum, a battle-scarred priest who has spent his life confronting evil—and who believes technology has no place in a war for the human soul.Their first mission takes them to a remote village, where a teenage girl is possessed by an entity unlike anything the Church has encountered before. It isn’t merely hiding inside her. It’s learning. Adapting. Evolving. And it wants what no evil has ever touched before. Not just a soul… but the power to possess anything. Even a machine.From the bestselling author of The Paranormalist series comes a chilling fusion of supernatural horror and science fiction. Perfect for fans of The Pope’s Exorcist, The Conjuring, Sinister, and Ex Machina.