Derived from the colorful traditions of vaudeville, burlesque, revue, and operetta, the musical has blossomed into America's most popular form of theater. Scott McMillin has developed a fresh aesthetic theory of this underrated art form, exploring the musical as a type of drama deserving the kind of critical and theoretical regard given to Chekhov or opera. Until recently, the musical has been considered either an "integrated" form of theater or an...