Terry Pratchett: A Life With Footnotes: The Official Biography

The Word for World: The Maps of Ursula K. Le Guin

The Writing of Middle Earth: How to write the script of the Hobbits, Dwarves and Elves

Tolkien's Modern Reading: Middle-earth Beyond the Middle Ages

Speculative Whiteness: Science Fiction and the Alt-Right (Forerunners: Ideas First)

The Battles of Tolkien (Tolkien Illustrated Guides)

The Science of Middle-earth: A New Understanding of Tolkien and His World

The Inklings and King Arthur: J. R. R. Tolkien, Charles Williams, C. S. Lewis, and Owen Barfield on the Matter of Britain

The Possibility of Life: Science, Imagination and Our Quest for Kinship in the Cosmos―Exploring the Fascinating History of Our Universe and the Possibility of Life Beyond Our Planet

The Gospel According to Tolkien: Visions of the Kingdom in Middle-earth