The works of interdisciplinary artist Kira O’Reilly use the uncertain boundaries of bodies as the starting point for their enquiry. Specifically, O’Reilly asks what kind of societies become possible in collaborations across species, organisms, and bodies, and she explores these questions through sustained and experimental engagements with politics, biopolitics, change (social, corporeal, chemical, reactive), and the complex relations between the human and the non-human. This book is the first to offer an in-depth engagement with her many works across diverse formats. Bringing together writings by major artists and thinkers, such as Marina Abramović, Shannon Bell, and Tracey Warr, alongside extensive documentation of the artist’s work from two decades of practice, the contributions engage with such topics as ideas of performance, feminist political aesthetics, biotechnical practices, image-making, and the intersections of humans and animals. The book also includes interviews, archive material, and O’Reilly’s own writings.