Gardner Fox was a prolific writer in DC Comics early history. Fox was a key figure in establishing some of Batman's long standing characteristics along with Bill Finger, like the first uses of the Batarang and utility belt.
Fox returned to Batman in 1965 with issue #171, penciled by Sheldon Moldoff at the behest of editor Julius Schwartz. He later worked with Carmine Infantino on the "New Look" Batman, putting him at two different eras of what are widely considered to be some of the earliest creative peaks of the character. During this time Fox also created Scarecrow's Fear Gas and expanded his characterization.