A Sourcebook of Performance Labor presents the views and experiences of collaborators in other artists' works. This book reorients well-known works of contemporary performance and social practice around the workers who have shaped, enacted, and supported them. It emerges from perspectives on maintenance, care, affective labor, and the knowledges created and preserved through gesture and intersubjectivity. This compilation of interviews is filled with the voices of collaborators in notable works attributed to established contemporary artists, including Francis Alys, Tania Bruguera, Suzanne Lacy, Ernesto Pujol, Asad Raza, Dread Scott, and Tino Sehgal. In the spirit of the artworks under discussion, this book reinvests in the possibilities for art as a collective effort to explore new ways of finding ourselves in others and others in ourselves. The Sourcebook collection is a contribution for further theorizing a largely unaddressed perspective in contemporary art. This collection will be of great interest to students and scholars in performance studies and art history.