In this prizewinning book, leading musical, theatrical, and literary scholars examine different aspects of the life and work of Kurt Weill, one of the most controversial composers of the twentieth century. Making use of documentary material now available for the first time, the contributors present startling revelations not only about Weill's career but also about his many collaborators---among them Brecht, Kasier, Reinhardt, Werfel, Ira Gershwin, Klemperer, Moss Hart, and Elisabeth Hauptmann.