- J.R.R. Tolkien Encyclopedia: Scholarship and Critical Assessment
- Tradition and Influence in Anglo-Saxon Literature: An Evolutionary, Cognitivist Approach
- Of Sorcerers and Men - Tolkien and the Roots of Modern Fantasy Literature (The Portable Professor Series)
- Beowulf Unlocked: New Evidence from Lexomic Analysis
- The Last Man Anthology: Tales of Catastrophe, Disaster, and Woe