His book On the Origin of Superheroes: from the Big Bang to Action Comics No. 1 was published by the University of Iowa Press in 2015, and his book Superhero Comics is forthcoming from Bloomsbury in 2017. His essays on superheroes and comics appear in Journal of Graphic Novels and Comics, Journal of American Culture, PS: Political Science and Politics, ImageTexT, Journal of Popular Culture, Image & Narrative, International Journal of Comic Art, and Studies in Comics.