Mary Marvel – Girl Hero: Gwandanaland Comics #430-B: A Special Selection of Stories from Wow Comics — The Golden Age Girl Superhero!

She grew up as Mary Bromfield, although her real name was Batson – twin sister to Billy Batson, the boy who could turn into Captain Marvel by saying “Shazam!” Once the truth is learned, Captain Marvel and Captain Marvel Jr. begin searching for the long-lost twin – only to find they must save her from kidnappers! Mary learns that saying “Shazam!” turns her into Mary Marvel, the third of the soon-to-explode Marvel Family. She had appearances in many magazines, including her own comic title. This is a special selection of stories from WOW COMICS and CAPTAIN MARVEL ADVENTURES