Weapons In Space / Seven Stories Press, 2001

Visions of the Multiverse: Do Parallel Realities Exist? Is Our Universe One of Many?, New Page Books, 2011

Universal Water: The Ancient Wisdom and Scientific Theory of Water / Inner Ocean, 2002

The Unknown Universe: The Origin of the Universe, Quantum Gravity, Wormholes, and Other Things Science Still Can’t Explain, New Page Books, 2008

The Unbroken Chain: To the Moon and Beyond (with Russell Still), Apogee Books, 2001

The Ultimate Time Machine: A Remote Viewer’s Perception of Time, and Predictions for the New Millennium / Hampton Roads, 1998

The Synchronized Universe: New Science of the Paranormal, Poseidia Press, 2003

The Sun, The Genome, and the Internet: Tools of Scientific Revolutions / Oxford Univ. Press, 1999

The Stargate Chronicles: Memoirs of a Psychic Spy / Hampton Roads, 2002

The Secret Art: A Brief History of Radionic Technology for the Creative Individual, Anomalist Books, 2009