Professor of English, co-editor of Tales for Little Rebels (2008), author of Dr. Seuss: American Icon (2004), The Annotated Cat (2007), and other books.

Professor of English and Director of the Program in Children's Literature at Kansas State University. Books include Crockett Johnson and Ruth Krauss: How an Unlikely Couple Found Love, Dodged the FBI, and Transformed Children's Literature (UP Mississippi, 2012), Keywords for Children's Literature (co-edited with Lissa Paul, NYU Press, 2011), Tales for Little Rebels: A Collection of Radical Children's Literature (co-edited with Julia Mickenberg, NYU Press, 2008), The Annotated Cat: Under the Hats of Seuss and His Cats (Random House, 2007), Dr. Seuss: American Icon (Continuum, 2004), The Avant-Garde and American Postmodernity: Small Incisive Shocks (UP Mississippi, 2002), and J. K. Rowling's Harry Potter Novels: A Reader's Guide (Continuum, 2001). Forthcoming: The Complete Barnaby (co-edited with Eric Reynolds, Fantagraphics, 2013-2017).