What American novelist published a genre work that mixed elements of science fiction and detective fiction,  Robert Creeley or Jonathan Lethem?
Robert Creeley: Robert Creeley (May 21, 1926 – March 30, 2005) was an American poet and author of more than sixty books. Jonathan Lethem: Jonathan Allen Lethem (LEE-thum, born February 19, 1964) is an American novelist, essayist and short story writer. Jonathan Lethem:  His first novel, "Gun, with Occasional Music", a genre work that mixed elements of science fiction and detective fiction, was published in 1994.
Jonathan Allen Lethem