The Worlds of Dune: The Places and Cultures that Inspired Frank Herbert

Astounding: John W. Campbell, Isaac Asimov, Robert A. Heinlein, L. Ron Hubbard, and the Golden Age of Science Fiction

Eleanor Cameron: Dimensions of Amazement

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

My Life with the Jedi: The Spirituality of Star Wars

The Expanse and Philosophy: So Far Out Into the Darkness

Green Suns and Faerie: Essays on J. R. R. Tolkien

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

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