UFOs and the National Security State: Chronology of a Coverup, 1941-1973
UFOs and the National Security State: The Cover-Up Exposed, 1973-1991
Alien Viruses: Crashed UFOs, MJ-12, & Biowarfare
Flying Saucers and Science: A Scientist Investigates the Mysteries of UFOs: Interstellar Travel, Crashes, and Government Cover-Ups
Encounter in Rendlesham Forest: The Inside Story of the World's Best-Documented UFO Incident
Earth: An Alien Enterprise: The Shocking Truth Behind the Greatest Cover-Up in Human History
Inside the Real Area 51: The Secret History of Wright Patterson
UFOs: Generals, Pilots, and Government Officials Go on the Record
Alien Agenda: Investigating the Extraterrestrial Presence Among Us
The Alien Abduction Files: The Most Startling Cases of Human Alien Contact Ever Reported
Captured! The Betty and Barney Hill UFO Experience: The True Story of the World's First Documented Alien Abduction
Witness to Roswell: Unmasking the Government's Biggest Cover-up (Revised and Expanded Edition)