 "The Tales of Beedle the Bard" provides an additional layer of fiction, the 'tales' being instructional stories told to children in the characters' world.In the works of Kurt Vonnegut, Kilgore Trout has written a novel called "Venus on the Half-Shell".In 1975 real-world author Philip José Farmer wrote a science-fiction novel called "Venus on the Half-Shell", published under the name Kilgore Trout.