Joe Simon is an American comic book writer, artist, editor, and publisher. Simon created or co-created many important characters in the 1930s-1940s Golden Age of Comic Books and served as the first editor of Timely Comics, the company that would evolve into Marvel Comics. His infrequently used pen names were Gregory Sykes and Jon Henery. With his partner, artist Jack Kirby, he co-created Captain America, one of comics' most enduring superheroes, and the team worked extensively on such features at DC Comics as the 1940s Sandman and Sandy the Golden Boy, and co-created the Newsboy Legion, the Boy Commandos, and Manhunter. Simon & Kirby creations for other comic book publishers include Boys' Ranch, Fighting American and The Fly. In the late 1940s, Simon and Kirby created the field of romance comics, and were among the earliest pioneers of horror comics.