Life and Death on Mars: The New Mars Synthesis, Adventures Unlimited Press, 2011

he Big Bang Never Happened: A Startling Refutation of the Dominant Theory of the Universe

Earth Under Fire: Humanity’s Survival of The Apocalypse, Starlane Publications, 1997

Distant Wanderers: The Search for Planets Beyond the Solar System / Capernicus Books, 2002

Destination Mars In Art, Myth and Science, Viking Penguin, 1997

Dead Mars, Dying Earth

Dead Mars, Dying Earth

Dark Moon: Apollo and the Whistle-Blowers, by Mary Bennett and David S. Percy, Adventures Unlimited Press, 2001

Dark Matter, Missing Planets and New Comets: Paradoxes Resolved, Origins Illuminated, North Atlantic Books, 1993

After the Martian Apocalypse: Extraterrestrial Artifacts and the Case for Mars Exploration, Paraview, 2004