Rocket to the Morgue

A mystery novel by Anthony Boucher in which members of an SF writer's organization play a major role. The organization (and the writers) are thinly disguised versions of the Mañana Literary Society and several of its members, including Robert A. Heinlein, Jack Williamson, L. Ron Hubbard, John W. Campbell, and Edmond Hamilton.

See http://www.heinleinsociety.org/rah/works/articles/murdersuspect.html for a more extended description of the novel.