On the Trail of the Saucer Spies: UFOs and Government Surveillance, Anomalist Books, 2006

One in Forty – The UFO Epidemic: True Accounts of Close Encounters with UFOs, Kroshka Books, 1997

Operation Roswell, Tor Books, 2002

Night Seige: The Hudson Valley UFO Sightings

Mysterious Lights and Crop Circles, LMH Productions, second edition, 2002

Mysterious Lights and Crop Circles, Paper Chase Press, 2000

Melbourne Episode: Case Study of a Missing Pilot, LDA Press, 1987

Messengers of Deception: UFO Contacts and Cults, And/Or Press, 1979

MILABS: Military Mind Control and Alien Abduction (with Marion Lammer), Illuminet Press, 1999

Millennium, Forge, 1994