This book examines Brecht's theory and method of adaptation. It first reconstructs it into a single framework using four key Brechtian concepts: Fabel, gestus, estrangement effects, and historicizing. It then uses that framework to analyse four Brechtian adaptations: The Tutor, Don Juan, "Socrates Wounded," and Kriegsfibel. It argues that adaptation occupies a previously unrealised central place in Brecht's thought, demonstrating that he provides us with a unique way to think about adaptation-as material transformation. It concludes by describing how Brecht is useful for anti-capitalist aesthetics today because through him one can foster a new consciousness which enables better social conditions to be created. This book is practical for both theatre practitioners and artists as well as theorists.