While a number of performing arts use rehearsals as part of their artistic process, the rehearsal is relatively new to contemporary art discourse. Looking at rehearsals as a methodology, this reader from the ongoing Academy of Fine Arts Vienna series offers a timely reappraisal of authorship, teamwork and the aesthetics and politics of the unfinished project. Looking at the work of Yvonne Rainer, Maya Schweitzer and others, Berlin-based art theorist Sabeth Buchmann investigates the rehearsal as both tool and site of artistic process and improvisation. Additional contributors focus on artistic practices as sites of production; rules and power relations within contemporary art; teamwork-based, net-based or systemic forms of collaboration. The reader coincides with a three-part event of the same title in Montreal organized by Buchmann, curator Ilse Lafer, and artist Constanze Ruhm bringing over 30 international artists together to address the rehearsal as medium, and artworks in terms of production, reception and their relationship to institutional power.