Wagner. Amadeus Press, . Millington, Barry (editor) (2001) The Wagner Compendium. Thames & Hudson, . Sabor, Rudolph, (1997) Richard Wagner: Der Ring des Nibelungen: a companion volume. Phaidon Press, . Scruton, Sir Roger, (2016) The Ring of Truth: The Wisdom of Wagner's Ring of the Nibelung. Penguin UK. . Spotts, Frederick, (1999) Bayreuth: A History of the Wagner Festival. Yale University Press. . Vernon, David, (2021) Disturbing the Universe: Wagner's Musikdrama. Edinburgh: Candle Row Press. . External links A podcast about The Ring. 1876 operas Operas Libretti by Richard Wagner