Book excerpt: (Applause Books). A companion to the six-part PBS documentary series, Broadway: The American Musical is the first comprehensive history of the musical, from its roots at the turn of the 20th century through the smashing successes of the new millennium. The in-depth text is lavishly illustrated with a treasure trove of photographs, sheet-music covers, posters, scenic renderings, production stills, rehearsal shots and caricatures, many previously unpublished. Revised and updated, with a brand-new foreword by Julie Andrews and new material on all the Broadway musicals through the 2009-2010 season.