The Big Book of UFOs

The UFO Files: The Inside Story of Real-life Sightings

Alien Craft, UFO's and Alien Technology

UFOs, ETs, and Alien Abductions: A Scientist Looks at the Evidence

A Covert Agenda: The British Government's UFO Top Secrets Exposed

Alien Mysteries, Conspiracies and Cover-Ups

The Extraterrestrial Answer Book: UFOs, Alien Abductions, and the Coming ET Presence

Strange Secrets: Real Government Files on the Unknown

Real Aliens, Space Beings, and Creatures from Other Worlds

Walking Through Walls and Other Impossibilities: The Hybrid Agenda

A World of UFOs

UFOs: Myths, Conspiracies, and Realities

Sight Unseen: Science, UFO Invisibility, and Transgenic Beings

We've Never Been Alone: A History of Extraterrestrial Intervention

Roswell: Uncovering the Secrets of Area 51 and the Fatal UFO Crash

UFO Headquarters: Investigations on Current Extraterrestrial Activity in Area 51

Alien Encounters

UFOs: A History of Alien Activity from Sightings to Abductions to Global Threat: A History of Alien Activity from Sightings to Abductions to Global Threat

The Government UFO Files: The Conspiracy of Cover-Up