Dennis Cooper, born January 10, 1953, is an American novelist, poet, critic, editor, and performance artist renowned for his significant contributions to contemporary literature. His most celebrated work is the George Miles Cycle, a series of five semi-autobiographical novels released between 1989 and 2000. This series is described by Tony O'Neill as "an intense dissection of human relationships and obsession that modern literature has ever attempted." Cooper's literary journey commenced with the founding and editing of Little Caesar Magazine, a punk zine that ran from 1976 to 1982.

Cooper's thematic exploration often navigates through controversial and stark territories such as violence, sex—particularly homosexual themes—human misery, and adolescence. His willingness to explore such themes candidly led to a notable dispute with Google when the company decided to shut down his personal blog, which hosted an unpublished novel, for violating contract terms. Among his prominent works are the novels Cacheo (1991) and Chaperos (2004).

Growing up in the Southern California cities of Covina and Arcadia, Cooper began writing stories and poems at an early age. Influenced profoundly by Arthur Rimbaud and The Marquis de Sade, he dedicated himself to writing seriously at 15. After attending LA county public schools, he was transferred to Flintridge Preparatory School for Boys in La Canada, California, which he eventually got expelled from in the 11th grade. His time at Flintridge led him to meet George Miles, who would become his muse and a central figure in his writing. Cooper spent two years at Pasadena City College, attending poetry writing workshops under the guidance of poets Ronald Koertge and Jerene Hewitt.