Angels, Demons, and Extraterrestrial Intelligence
- Angels and Demons: What Do We Really Know about Them? by Peter Kreeft
- An Exorcist Explains the Demonic: The Antics of Satan and His Army of Fallen Angels by Gabriele Amorth
- Extraterrestrial Intelligence and the Catholic Faith: Are We Alone in the Universe with God and the Angels? by Paul Thigpen
- Science, Religion, and the Search for Extraterrestrial Intelligence by David Wilkinson
- The Screwtape Letters by C. S. Lewis
- The Space Trilogy – Out of the Silent Planet, Perelandra, and That Hideous Strength by C. S. Lewis