* The Last Testament
* The Spirit Returns
* The Doomsday Key
* The Omega Directive
* The Judas Codex
Articles:
* "The Role of Religion in the 21st Century"
* "The Future of Artificial Intelligence"
* "The Search for Extraterrestrial Life"
* "The Science of Consciousness"
* "The Meaning of Life"
Essays:
* "Mysteries of the Universe"
* "Ancient Aliens"
* "The Mind-Body Problem"
* "Free Will vs. Determinism"
* "The Afterlife"