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In the Belly of the Beast
Psycho 2 belly of the beast.jpg
Mary Loomis Reads in Psycho II
Owner(s) Mary Loomis
Type Book
First Appearance Psycho II
Last Appearance Psycho III

In the Belly of the Beast is a book of letters written to Norman Mailer by Jack Abbott. Abbott was a forger and murderer and the letters were about what he considered an unjust prison system.

Mary Loomis was reading In the Belly of the Beast when she stayed at the Bates House (Psycho II). Some time later, the book was seen rotting on the Bates property (Psycho III).