Psycho is a horror and fiction type novel written By Robert Bloch. The main characters of this novel are Norman Bates, Mary Crane, Lila Crane, and Sam Loomis. In this novel, It was a dark and stormy night when Mary Crane flashed the sign on the Bates Motel’s declaration of vacancies. His house was needy but clean, and the plumbing worked. Manager Norman Bates looked pretty good when he saw something odd.