Kozlowski traces the history of improvisational acting in Chicago from the days of Viola Spolin to the appearance of the Compass, Second City, and today's practitioners, In between, he takes a detailed look at Charna Halpern and the ImprovOlympic "revolution," Del Close and the development of a long-form improvisation called the Harold, and all that followed. Kozlowski also provides a guide to improv troupes seeking a style that's just right for them, with detailed descriptions of specific productions and discussions of the implications of pursuing certain improv techniques. His interviews with Annoyance Theater founder Mick Napier, ImprovOlympic veteran Noah Gregoropoulos, and ImprovOlympic's Training Center Director Liz Allen reveal the challenges and joys of long-form improvisation and how aspiring improv artists can get involved.