Giacomo Puccini is one of the most performed composers in international music theater. Manon Lescaut, La Bohème, Tosca, Madama Butterfly, and Turandot are staples of opera programs. In a politically tumultuous era, Puccini succeeded in bringing fundamental human conflicts to the stage at the intersection of tradition and modernity. Beyond all sentimentality and superficiality, he found a musical language that still captivates today and invites deep engagement with Puccini's work. The biography, based on the latest research, focuses equally on Puccini's life and his work. It becomes clear how Puccini struggled with the musical realization of the immediate expression of emotions, starting from the search for suitable material and the appropriate libretto language to his interest in the time structure of the pieces.