| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| In The Shadow of the Dreamchild: The Myth and Reality of Lewis Carroll | 978-0-7206-1318-6 (0-7206-1318-3) | 2009 |
| Lewis Carroll - In the Shadow of the Dreamchild: New Understanding of Lewis Carroll | 978-0-7206-1044-4 (0-7206-1044-3) | 1999 |