Book excerpt: An investigation of the complex relationship of form and practice through the lens of the smallest multiple units of collaboration: the pair. Drawing out the particularities of collaborative work, Entanglements of Two: A Series of Duets considers the duo as a microcosm of humankind. Focusing on a ten-year period in the work of collaborative performance maker Karen Christopher, the book explores the practical, philosophical, and aesthetic implications of performers working in pairs and offers wider reflections on the duet as a concept in artistic and social life. The twenty-five pieces in the collection--from an international group of collaborators, artists, and performance scholars, alongside writing from related disciplines, including linguistics, physics, poetry, and theology--offer critical reflections on artistic collaboration and entanglement and contemplate their significance on an interpersonal and global level. A foreword by writer and artist Season Butler rounds out this essential volume.