Billy BatsonIn style and tone, Billy Batson and the Magic of Shazam! is a followup to Jeff Smith's 2007 miniseries Shazam!: The Monster Society of Evil, as both draw upon the light, whimsical feel of the Captain Marvel comics of the Golden Age for inspiration. In Magic of Shazam!, Billy Batson is a young boy who must juggle his superheroic life as Captain Marvel with looking after his rambunctious little sister Mary Marvel. Unlike Billy, who transforms into an adult when he speaks the magic word "Shazam", Mary possesses only a fraction of his power, although she is faster, and remains a child in her superhero form.