Psycho II

(From the publisher) The nightmare continues . . . You remember Norman Bates, the shy motel manager with the fatal mother fixation. Now, years after his horrific bout of butchery, Norman is at large again. Breaking free from the psycho ward, he cuts a shocking swath of blood all the way to Hollywood--where, it so happens, they are making a movie about Norman s life and crimes. A movie that suddenly and terrifyingly becomes a lot like real life.

(Wikipedia) Psycho II is a 1982 novel that Robert Bloch wrote as a sequel to his 1959 novel Psycho. The novel was completed before the screenplay was written for the unrelated 1983 film Psycho II. According to Bloch, Universal Pictures loathed the novel, which was intended to critique Hollywood splatter films. A different story was created for the film and Bloch was not invited to any screenings. Universal suggested that Bloch abandon his novel, which he declined and released anyway to good sales.