Ever since its invention in Florence around 1600, opera has exerted a peculiar fascination for creative artists and audiences alike. A "Western" genre with a global reach, it is often regarded as the pinnacle of high art, where music and drama come together in unique ways, supported by stellar singers and spectacular staging. Yet it is also patently absurd--why should anyone sing on the stage?--and shrouded in mystique. In this engaging and entertaining...