Unidentified flying objects

Invisible Residents: The Reality of Underwater UFOs

UFOs among the Stars: Close-Encounters of the Famous

Signs on the Earth: Deciphering the Message of Virgin Mary Apparitions, UFO Encounters, and Crop Circles

UFO Testament: Anatomy of an Abductee

Ultimate UFO Book

In Advance of the Landing: Folk Concepts of Outer Space

Need to Know: UFOs, the Military, and Intelligence

The Report on Unidentified Flying Objects

Keepers of the Garden

The Mothman Prophecies: A True Story

The Utah UFO Display: A Biologist's Report

Close Encounters of the Fatal Kind: Suspicious Deaths, Mysterious Murders, and Bizarre Disappearances in UFO History

UFOs

Encounter in the Pleiades: An Inside Look at UFOs

New Lands

Flying Saucers and Science: A Scientist Investigates the Mysteries of UFOs

Captured!: The Betty and Barney Hill UFO Experience: The True Story of the World's First Documented Alien Abduction

Crash: When UFOs Fall From the Sky: A History of Famous Incidents, Conspiracies, and Cover-Ups

Alien Agenda: Investigating the Extraterrestrial Presence Among Us

UFOs: God's Chariots?: Spirituality, Ancient Aliens, and Religious Yearnings in the Age of Extraterrestrials

UFOs: An Insider's View of the Official Quest for Evidence

UFOs Over Canada: Personal Accounts of Sightings and Close Encounters

The Mothman Prophecies

UFOs: God's Chariots: Spirituality, Ancient Aliens, and Religious Yearnings in the Age of Extraterrestrials