This article is a stub. You can help Psycho Wiki by expanding it. Robert Bloch's Psycho: Sanitarium is a 2016 novel by Chet Williamson. It serves as both a sequel to Psycho and a prequel to Psycho II. It is the only official novel in the Psycho series not written by Robert Bloch. Retrieved from "https://psycho.fandom.com/wiki/Psycho:_Sanitarium?oldid=4920" Categories: Article stubs Books Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.