False documents are a frequent device in literature. This is a list of fictional books that appear in television, movies, music, video games, and other non-print media. Fictional books appearing in books are listed in List of fictional books. Fictional books appearing in comics, newspapers, and the like are listed in List of fictional books from periodicals.
From the Bookshop Sketch:
In The Wrestling Epilogue (from Episode 2: Sex And Violence):
In the Bookshop Sketch (from Monty Python's Contractual Obligation Album):
by Dick Loudon
By Adam Shadowchild:
By Clive Gollings, illustrated by Graeme Willy:
Most are parodies of a work, pointed to by the link.