Improvization is a performance practice that animates and activates diverse energies of inspiration, critique, and invention. In recent years it has coalesced into an exciting and innovative new field of interdisciplinary scholarly inquiry, becoming a cornerstone of both practical and theoretical approaches to performance. This title draws together the works of key artists and thinkers from a range of disciplines, including theatre, music, literature, film, and dance. Divided by keywords into eight sections, this book bridges the gaps between these fields.