This book is a survey of Broadway musicals all through the 20th century, from turn-of-the century Tin Pan Alley comedies, to the integrated musical plays that flourished midcentury, to the rock era, concept musicals, and the arrival of British mega musicals late in the century. It also profiles some of the theater world's leading composers, writers, and directors; considers the elusive fragility of the libretto and the compensating nature of production elements; and examines representative shows from every decade. An extensive discography offers a brief critique of over 300 show cast albums.