
His 60-issue run on Quasar realized Gruenwald's ambition to write his own kind of superhero.Al Gordon Al Milgrom Al Rio Alex Ross Andy Kubert Andy Smith Art Thibert Avalon Ed Tadeo Avalon Studios Bill Rosemann Bob Layton Bob Mcleod Bob Wiacek Brent Anderson Brian Hurtt Brian Marshall Brian Stelfreeze Bruce Timm Chris Sotomayor Christie Scheele Dale Eaglesham Dan Green Dan Jurgens Denis Rodier Doug Braithwaite Ed Benes Ed Tadeo Evan Dorkin Gregory Wright Homage Studios Igor Kordey James Robinson Jay Faerber Jean Segarra-Rosa Jen Van Meter Jeph Loeb Jerry Ordway Jesse Delperdang Jim Lee Jim Mahfood Joe Bennett Joe Kubert Joe Phillips Joe Rosas John Beatty John Costanza John Romita Sr. Nick Fury Quasar (Wendell Vaughn) Quicksilver Red Skull Scarlet Witch Sharon Carter Skrulls Spider-Man (Peter. He made a deliberate effort to create villains who would be specific to Captain America, as opposed to generic foes who could as easily have been introduced in another comic. Absorbing Man Batroc the Leaper Captain America Captain Marvel (Carol Danvers) Captain Marvel (Mar-Vell) Count Nefaria Crossbones Dum Dum Dugan Falcon Hawkeye Hydra Iron Man Ka-Zar Kang Klaw Korvac Lady Deathstrike M.O.D.A.M. As a writer, Gruenwald is best known for creating the Official Handbook of the Marvel Universe and his ten-year stint as the writer of Captain America during which he contributed several notable characters such as Crossbones, Diamondback and U.S.

In 1982, Gruenwald, Steven Grant, and Bill Mantlo co-wrote Marvel Super Hero Contest of Champions, the first limited seriespublished by Marvel Comics.

During this period, he shared an office with writer/editor Denny O'Neil, whom Gruenwald considered a mentor. Hired initially as an assistant editor in January 1978, Gruenwald was promoted to full editorship by Marvel editor-in-chief Jim Shooter in 1982, putting Gruenwald in charge of The Avengers, Captain America, Iron Man, Thor, Spider Woman, and What If. In 1978 he was hired by Marvel Comics, where he remained for the rest of his career.

Articles by Gruenwald include "The Martian Chronicles" (a history of the Martian Manhunter) in issue #13 and several articles on the history of the Justice League in issue #14. Before being hired by Marvel, he wrote text articles for DC Comics official fanzine, The Amazing World of DC Comics.

Gruenwald got his start in comics fandom, publishing his own fanzine, Omniverse, which explored the concept of continuity.
