Alfred Coppel, Alfredo Jose de Arana-Marini Coppel (November 9, 1921 – May 30, 2004) was an American author.
Born in Oakland, California, he served as a fighter pilot in the United States Army Air Forces during World War II.
After his discharge, he started his career as a writer.
He became one of the most prolific pulp authors of the 1950s and 1960s, adopting the pseudonyms Robert Cham Gilman and A.C.
Marin and writing for a variety of pulp magazines and later "slick" publishers.
Though writing in a variety of genres, including action thrillers, he is known for his science fiction stories which comprise both short stories and novels.