What to read after Aspects of Wagner?

Many music lovers find Wagner's operas inexpressibly beautiful and richly satisfying, while others find them revolting, dangerous, self-indulgent, and immoral. The man who W.H. Auden once called "perhaps the greatest genius that ever lived" has inspired both greater adulation and greater loathing than any other composer.
Bryan Magee presents a penetrating analysis of Wagner's work, concentrating on how his sensational and deeply erotic music uniquely expresses the repressed and highly charged contents of the psyche. He examines not only Wagner's music and detailed stage directions but also the prose works in which he formulated his ideas, as well as shedding new light on his anti-semitism and the way in which the Nazis twisted his theories to suit their own purposes. Outlining the astonishing range and depth of Wagner's influence on our culture, Magee reveals how profoundly he continues to shock and inspire musicians, poets, novelists, painters, philosophers, and politicians today.