Ever since the first appearances of Superman and Batman in comic books of the late 1930s, superheroes have been a staple of the popular culture landscape. Though initially created for younger audiences, superhero characters have evolved over the years, becoming complex figures that appeal to more sophisticated readers. While superhero stories have grown ever more popular within broader society, however, comics and graphic novels have been largely ignored by the world of academia. In Enter the Superheroes: American Values, Culture, and the Canon of Superhero Literature, Alex S. Romagnoli and...