Claim: Mary Marvel was created by an author of non-fiction.
Evidence: Created by Otto Binder and Marc Swayze , she first appeared in Captain Marvel Adventures # 18 -LRB- cover-dated Dec. 1942 -RRB-.
Otto Oscar Binder -LRB- August 26 , 1911 -- October 13 , 1974 -RRB- was an American author of science fiction and non-fiction books and stories , and comic books.