Stephen Zepke is an independent researcher living in Vienna. He has published numerous essays on philosophy, art and cinema, the book Art as Abstract Machine, Ontology and Aesthetics in Deleuze and Guattari (Routledge, 2005), and is co-editor (with Simon O'Sullivan) of Deleuze, Guattari and the Production of the New (Continuum, 2008).Simon O'Sullivan is a lecturer in the Department of Visual Cultures at Goldsmiths, University of London. He is the author of Art Encounters Deleuze and Guattari: Thought Beyond Representation (Palgrave, 2005) and co-editor (with Simon O'Sullivan) of Deleuze, Guattari and the Production of the New (Continuum, 2008).