In this novel, Vonnegut uses Borges's technique of writing summaries of nonexistent novels and stories written by a fictitious author (in this case, of course, the author is Kilgore Trout). One of the main themes of this novel is that humans are automatons having no free will. The idea that people are characters in the mind of an unknown author is visited in several ways. Breakfast of Champions is more "vulgar" than the average novel (by the end of the novel, the reader is aware of the penis measurements - both length and girth - of every male character), and I'm not sure what narrative purpose Vonnegut's technique serves.