Retitled Monsters on the Prowl with issue #9 (Feb. 1971), this version ran one new story each issue through #13 (Oct. 1971) with the remaining content consisting of reprints from Atlas Comics, Marvel's 1950s predecessor, and "pre-superhero Marvel", primarily drawn by Jack Kirby or Steve Ditko. It expanded into a double-sized, 25-cent comic for two issues (#13-14, Oct.-Dec. 1971). Some issues of the reprint books featured new covers by John Severin, Marie Severin, Gil Kane, and Herb Trimpe.
A 10-page sword and sorcery story starring King Kull, "The Forbidden Swamp", by writer Thomas and art by the Severin siblings, appeared in issue #16 (April 1972); it continued the story from Kull the Conqueror #2 (Sept. 1971), during a 10-month hiatus before that series resumed with #3.
A flashback adventure pitting superheroes against Marvel monsters appeared in a 2005 one-shot labeled Monsters On The Prowl #1 on the cover, and Marvel Monsters: Monsters On The Prowl #1 in its postal indicia.
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