I Saw the World End: A Study of Wagner's Ring (Clarendon Paperbacks)
Wagner's Ring of the Nibelung: A Companion
Wagner's Ring: Turning the Sky Round
The Tristan Chord: Wagner and Philosophy
Rackham's Color Illustrations for Wagner's "Ring"
Opera and its Symbols: The Unity of Words, Music and Staging
Ring of Power: Symbols and Themes Love Vs. Power in Wagner's Ring Cycle and in Us- A Jungian-Feminist Perspective (Jung on the Hudson Book Series)
Wagner: Der Ring Des Nibelungen [16 CD/CD-ROMCombo]
The Wagner Operas
The Ring of the Nibelung