John Stewart is a fictional character, a comic book superhero published by DC Comics. He first appeared in Green Lantern vol. 2 #87 (December 1971/January 1972), and was created by Dennis O'Neil and Neal Adams.
John Stewart has become a major recurring character in the Green Lantern mythos within the DC Universe. He starred in the short-lived spin-off comic Green Lantern: Mosaic, of which DC published 18 issues between June 1992 and November 1993. Additionally, he was the primary character in Green Lantern (vol. 2) from issues #182 through #200, when Jordan relinquished his place in the Corps (1984–1986).
He is the second Green Lantern not to wear a mask. He is one of DC's first black costumed superheroes.
While initially unknown to non-comics readers, his profile has been raised significantly since he was featured as one of the lead characters on the television cartoon Justice League from 2001 until 2004. He continued to appear on the show's 2004-2006 sequel, Justice League Unlimited. As of 2007, John Stewart is prominently featured in DC's monthly comic books Justice League of America and Green Lantern.
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Official Site: DC Comics
Links: Wikipedia Unofficial DCU Biography The Black Green Lantern