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- 1972: The Fictitious Characters of C.S. Lewis and J.R.R. Tolkien (doctoral dissertation)
- 1982: J.R.R. Tolkien: A Critical Biography (with Ivor Rogers)
- 1966: Orcrist 1
- "Music To Read Tolkien By: Tunes for Two Poems"
- 1970: Orcrist 4
- "A Proposal for a Doctoral Dissertation in the Department of Comparative Literature at the University of Wisconsin-Madison"
- 1975: A Tolkien Compass
- "Everyclod and Everyhero: The Image of Man in Tolkien"