Since the 1960s, artworks that involve the participation of the spectator have received extensive scholarly attention. Yet interactive artworks using digital media still present a challenge for academic art history. In this book, Katja Kwastek argues that the particular aesthetic experience enabled by these new media works can open up new perspectives for our understanding of art and media alike. Kwastek, herself an art historian, offers a set of theoretical and methodological tools that are suitable for understanding and analyzing not only new media art but also other contemporary art forms. Addressing both the theoretician and the practitioner, Kwastek provides an introduction to the history and the terminology of interactive art, a theory of the aesthetics of interaction, and exemplary case studies of interactive media art. Kwastek lays the historical and theoretical groundwork with discussions of processual strategies of twentieth-century art and theories of aesthetic experience, process aesthetics, play, and performance. She then develops an aesthetics of interaction, discussing such aspects as real space and data space, temporal structures, instrumental and phenomenal perspectives, and the relationship between materiality and interpretability. Finally, she applies her theory to specific works of interactive media art, including narratives in virtual and real space, interactive installations, and performance -- with case studies of works by Olia Lialina, Susanne Berkenheger, Stefan Schemat, Teri Rueb, Lynn Hershman, Agnes Hegedus, Tmema, David Rokeby, Sonia Cillari, and Blast Theory.