Ring productions at Bayreuth

If you are interested in the Bayreuth Festival or productions of Der Ring des Nibelungen, you should buy Philippe Olivier's book Der Ring des Nibelungen in Bayreuth von den Anfängen bis heute.The book covers all production at Bayreuth, from the first in 1876 to Tankred Dorst's running now. It is loaded with interesting photographs of productions, singers, rehearsals etc.Unfortunately it is only