High Quality Content by WIKIPEDIA articles! Ace Books is the oldest active 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; this was a successful innovation, and within a few years, sf titles outnumbered both mysteries and westerns. In the Worlds Without End database, Ace ranks third among publishers by all-time count of major science fiction and fantasy award nominations. Other genres also made an appearance, including nonfiction, gothic novels, media tie-in novelizations, and romances.