While Puccini wrote only twelve operas during a long life--three of them one-acters designed to be performed together--he has to be ranked today as the world's most popular composer of opera. His La Boh me and Tosca are more frequently performed in the major opera houses than works by other composers, and Madame Butterfly and Manon Lescaut rank not far behind. What is the explanation for Puccini's enormous success? How do his operas work as music...