Who Killed Kennedy

 was a journalistic work by James Stevens. (PROSE: Who Killed Kennedy)

Behind the scenes
Who Killed Kennedy was the fictional book-within-a-book of the novel of the same. Most of the events of the novel can be assumed to be within the fictional book, but the novel certainly contains things that weren't in the fictional book. It's a bit hard to separate the two with any degree of specificity, however.