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

In Plain Sight - An investigation into UFOs and impossible science

Ross Coulthart

UFO!

Tore Aurstad

The Big Book of Big Secrets

Publications International Ltd

Occulture

Carl Abrahamsson

Cosmos

Carl Sagan

The Super Natural

Whitley (Whitley Strieber) Strieber

Aliens

Jim Al-Khalili

Edges of Science

Thom Powell

Ghosts

Paul Roland

UFOs caught on film - Amazing evidence of Alien visitors to earth

Ibrāhīm 'Abd al-Majīd

The Eerie Silence: Renewing Our Search for Alien Intelligence

Paul Davies

The Secret History of the World

Jonathan Black

Confessions of an Alien Hunter: A Scientist's Search for Extraterrestrial Intelligence

Seth Shostak

Sasquatch True-life Encounters with Legendary Ape-men

Rupert Matthews

Need To Know: UFOs, The Military and Intelligence

Timothy Good

Aliens Why They are Here

Bryan Appleyard

Cracks in the Great Wall UFOs and Traditional Metaphysics

Charles Upton

The global terrorism

Charles W.

Flying Saucers

Carl Gustav

Conspiracies and Cover-Ups

David Alexander

The UFO Investigator's Guide

David Coomer

Universets mysterier (Merkelige fenomener)

Colin Wilson

Our evolving universe

Malcolm s.

The Unexplained

Nigel Blundell

Unexplained! 347 Strange Sightings, Incredible Occurrences, and Puzzling Physical Phenomena

Jerome Clark

Mind over Matter

Time Life

Modern Mysteries of the World

Janet Bord, Colin Bord

The UFO Phenomenon

Time Life

Det usynlige kollegium

Jacques Vallee

Kosmos

Carl Sagan

The World Atlas of Mysteries

Francis Hitching

UFO fænomenet. Beviser for uhyggelige nærkontakter af første, anden og tredje grad.

Johannes von Buttlar

Amazing Universe

Herbert Friedman

Challenge of the stars

Patrick Moore

Secret Doors of the Earth: The Hidden Influence of Ancient Aliens and Sacred Geography on Human History

Jacques Bergier

Verdens beste Science Fiction

Donald A.

Flying Saucers: the Startling Evidence of the Invasion From Outer Space

Coral Lorenzen

Universets mysterier

Colin Wilson

UFO-fenomenet