Marie-Laure Ryan is an independent scholar. She is the author of Possible Worlds, Artificial Intelligence, and Narrative Theory, Narrative as Virtual Reality, and Avatars of Story, as well as the editor of Narrative across Media (Nebraska, 2004), among others. Jan-No¿Thon is a research associate in the Department of Media Studies at the University of T¿bingen. Most recently, he has coedited From Comic Strips to Graphic Novels: Contributions to the Theory and History of Graphic Narrative.