The World's Mightiest Girl is Captain Marvel's twin sister, Mary Marvel! The Shazam Girl teams up with her brother on two separate cases, plus running into creatures from Venus, battling plant monsters, meeting Davy Jones, busting a ghost, and nabbing Nazi spies! Golden Age comics tales from the pages of Fawcett's Captain Marvel Adventures and Wow Comics. The very first magical girl of comics acts as the heart of the legendary Marvel Family! 68 pages long, and in color!