| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Bandersnatch: C.S. Lewis, J.R.R. Tolkien, and the Creative Collaboration of the Inklings | Paperback | 978-1-60635-276-2 (1-60635-276-8) | 2015 |
| The Company They Keep: C. S. Lewis and J. R. R. Tolkien as Writers in Community | " | 978-0-87338-991-4 (0-87338-991-3) | 2008 |
| The Company They Keep: C. S. Lewis and J. R. R. Tolkien as Writers in Community | Hardcover | 978-0-87338-890-0 (0-87338-890-9) | 2007 |