- Bandersnatch: C.S. Lewis, J.R.R. Tolkien and the Creative Collaboration of the Inklings
- C. S. Lewis Readers' Encyclopedia, The
- A Compass for Deep Heaven: Navigating the C. S. Lewis Ransom Trilogy
- Clay in the Potter's Hands: Second Edition
- The Company They Keep: C. S. Lewis and J. R. R. Tolkien as Writers in Community