This volume offers an introduction to theoretical foundations and central aspects of the relationality of texts and media. It traces the development from classical intertextuality (Genette, Kristeva) to more recent intermediality research (Rajewsky, Paech), but also addresses the question of the combination and competition of media from the rivalry of the arts in antiquity and the early modern period to contemporary media convergence. Three detailed chapters of analysis present possible applications based on literary and audiovisual examples.