- Downing, David C. (2005). Into the Wardrobe: C. S. Lewis and the Narnia Chronicles. San Francisco: Jossey-Bass. ISBN 978-0-7879-7890-7.
- Duriez, Colin (2 June 2004). A Field Guide to Narnia. IVP Books. ISBN 978-0-8308-3207-1.
- Ford, Paul (2005). Companion to Narnia: A Complete Guide to the Magical World of C. S. Lewis's The Chronicles of Narnia. HarperCollins Publishers. ISBN 978-0-06-079127-8.
- Schakel, Peter (2002). Imagination and the Arts in C.S. Lewis: Journeying to Narnia and Other Worlds. University of Missouri Press. p. 35. ISBN 978-0-8262-1407-2.
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