ACE

Ace Books is an American specialty publisher of science fiction and fantasy books. The company was founded in New York City in 1952 by Aaron A. Wyn and began as a genre publisher of mysteries and westerns. It soon branched out into other genres, publishing its first science fiction (SF) title in 1953. In 1972, Ace was acquired by Grosset & Dunlap, and in 1982, Grosset & Dunlap was in turn acquired by G.P. Putnam's Sons. In 1996, Penguin Group (USA) acquired the Putnam Berkley Group, and has retained Ace as its SF imprint.