This is a survey of Broadway musicals all through the 20th century, from the Tin Pan Alley-driven comedy works of the early part of the century, to the integrated musical plays that flourished in the heyday years of midcentury, and to the rock era, concept musicals, and the arrival of British playwrights and musicals late in the century. Some of the theater world's leading composers, writers, and directors are profiled, and the book considers some of the most unforgettable shows (but not forgetting the forgettable ones), illustrates the fragility of the libretto, explains the compensating nature of production elements, and examines shows from every decade. An extensive discography offers a brief critique of over 300 show cast albums.