Psycho II is a horror novel written by Robert Bloch. It is the sequel to the novel Psycho, and the second in the Psycho Trilogy, the third being Psycho House. Psycho II is not related to the film Psycho II, aside from sharing the character Norman Bates. Psycho II was originally published in 1982.
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You remember Norman Bates - the shy motel manager with the fatal mother fixation. Now, years after his bout of butchery that horrified the world, Norman is at large again, breaking free from the psycho ward, cutting a shocking swath of blood all the way to Hollywood - where, so it happens, they are making a movie about Norman's life and crimes. A movie that suddenly and terrifyingly becomes a lot like real life....