Alexandra Antonopoulou and Eleanor Dare have been collaborating on the Phi Books Project for ten years. The project is concerned with writing, embodiment, performance collaboration and computation. Together they have used motion capture, ‘interactive’ film, writing and performance to explore the limits of digitally mediated books. This year they have started to create a virtual reality Phi Book, in which, together with human users, non-human, artificial intelligences, attempt to find their way through a series of mutating, virtual rooms which embody narratives of collaboration and trust, as well as their opposites – small stories of exploitation and mistrust. The project draws upon posthuman theories of ontological fluidity - between humans and computers, subjects and objects, The authors deploy performance and narrative as methods to test the limits of digital mediation.