Question: What American novelist published a genre work that mixed elements of science fiction and detective fiction,  Robert Creeley or Jonathan Lethem?

Context paragraphs:
A Gambler's Anatomy: A Gambler's Anatomy (published as The Blot in the United Kingdom) is a 2016 novel by American author Jonathan Lethem.  The plot concerns Alexander Bruno, a professional backgammon player with "psychic tendencies".  The novel received mixed reviews and was compared negatively to other novels by Lethem.

Light and the Sufferer: Light and the Sufferer is a 2007 American science fiction film starring Paul Dano, Paz de la Huerta, Michael Esper, and Paul D'Amato and directed by Christopher Peditto.  It is based on a short story by Jonathan Lethem.

Gun, with Occasional Music: Gun, with Occasional Music is a 1994 novel by Jonathan Lethem.  It blends science fiction and hardboiled detective fiction.  It was nominated for the Nebula Award for Best Novel in 1994.

Robert Creeley: Robert Creeley (May 21, 1926 – March 30, 2005) was an American poet and author of more than sixty books.  He is usually associated with the Black Mountain poets, though his verse aesthetic diverged from that school's.  He was close with Charles Olson, Robert Duncan, Allen Ginsberg, John Wieners and Ed Dorn.  He served as the Samuel P. Capen Professor of Poetry and the Humanities at State University of New York at Buffalo.  In 1991, he joined colleagues Susan Howe, Charles Bernstein, Raymond Federman, Robert Bertholf, and Dennis Tedlock in founding the Poetics Program at Buffalo.  Creeley lived in Waldoboro, Maine, Buffalo, New York, and Providence, Rhode Island, where he taught at Brown University.  He was a recipient of the Lannan Foundation Lifetime Achievement Award.

Unstuck: Unstuck was an American literary magazine based in Austin, Texas that published fiction and poetry.  Since its first volume, released in the fall of 2011, "Unstuck" has been devoted to breaking down traditional genre fiction barriers.  Past contributors include Aimee Bender, J. Robert Lennon, Jonathan Lethem, Elizabeth McCracken, and Joe Meno.  The magazine was published annually.

As She Climbed Across the Table: As She Climbed Across the Table is a 1997 novel by the American writer Jonathan Lethem.  This satirical science fiction story is set on the fictional campus of Beauchamp University in Northern California.  Particle physicist Alice Coombs rooms with narrator Philip Engstrand, an anthropologist researching conflicts between and within disciplines.  Their relationship drives the romantic aspect of this story.  The novel deals thematically with many of the philosophical issues pertaining to modern quantum physics, as well as human interaction with artificial intelligence.

Motherless Brooklyn: Motherless Brooklyn is a Jonathan Lethem detective story set in Brooklyn and published in 1999.  Lethem's protagonist, Lionel Essrog, has Tourette syndrome, a disorder marked by involuntary tics. Essrog works, along with Tony, Danny and Gilbert, who call themselves the Minna Men, for Frank Minna—a small-time neighborhood owner of a "seedy and makeshift" detective agency—who is stabbed to death.

The Wall of the Sky, the Wall of the Eye: The Wall of the Sky, the Wall of the Eye is a 1996 collection of seven short stories by Jonathan Lethem.  In 2002 a collection of the same name appeared in the UK that also contained seven stories, but two stories from the earlier collection—"Vanilla Dunk" and "Forever, Said the Duck"—were replaced by "Access Fantasy" and "How We Got Into Town And Out Again".  All of the stories, as with much of Lethem's early work, have definite science fiction elements despite their widely varying content and some thinly veiled commentary on modern society.

Girl in Landscape: Girl in Landscape is a science fiction novel by Jonathan Lethem, originally published as a 280-page hardback in 1998, by Doubleday Publishing Group.  It is said to evoke the classic Western film, "The Searchers" (1956).

Jonathan Lethem: Jonathan Allen Lethem (LEE-thum, born February 19, 1964) is an American novelist, essayist and short story writer.  His first novel, "Gun, with Occasional Music", a genre work that mixed elements of science fiction and detective fiction, was published in 1994.  It was followed by three more science fiction novels.

Supporting paragraphs: Robert Creeley Jonathan Lethem
Answer: Jonathan Allen Lethem