Books about extraterrestrial life include:
- The Briefings from the Allies of Humanity an off-world assessment of our situation delivered with maximum signal to noise ratio, very cogent.
- Marshall Vian Summers. Life in the Universe and additional chapters available online only, deliver the essential message for our time: we are not alone, and we are not prepared; a very suitable preparation is given, but time is of the essence.
- 650 Most Essential Reading List compiled by exostudies.org
Surveys of the history of the phenomena and the human response
- Don Berliner, Antonio Huneeus and Marie “Bootsie” Galbraith, eds.The Rockefeller Briefing Document (1995) Available online.
- David Clarke. The UFO Files: The Inside Story of Real Life Sightings (2009). Extract available online.
- Edward U Condon and Daniel S Gillmor. “Scientific Study of Unidentified Flying Objects.” (1969) Available online, reviewed by John G. Fuller in Look Magazine, May, 14, 1968: "Flying Saucer Fiasco"
- Richard M. Dolan. UFOs and the National Security State, vv. I & II.
- John Michael Greer. The UFO Phenomenon: Fact, Fantasy and Disinformation, 2009.
- Gerald K. Haines. CIA's Role in the Study of UFOs, 1947-90. Available online.
- Richard Hall, ed. The UFO Evidence (1964). Available online.
- J. Allen Hynek, Statement before the U.S. House Committee on Science and Astronautics, 1968
- David M. Jacobs. Secret Life, The Threat
- Karla Turner. Taken, Masquerade of Angels
- Kevin Randle. The UFO Dossier: 100 Years of Government Secrets, Conspiracies and Cover Ups, 2015.
- Edward J Ruppelt. The Report on Unidentified Flying Objects (1956). Available online
- Karla Turner. Into the Fringe tells how alien abduction was learned to be the explanation for all the strange events which had been happening to her family. 1992.
- Whitley Strieber. Communion: A True Story, 1987
- John B. Alexander. UFOs: Myths, Conspiracies, and Realities a guided tour of the government channels in pursuit of the UFO question. 2011.
- Donald Cooper. Old Soldier Drops Three Bombs... And THEN, 2016.
- Raymond Fowler. SynchroFile: Amazing Personal Encounters With Synchronicity And Other Strange Phenomena, 2004.
- Raymond Fowler. The Andreasson Affair, 2014.
- Travis Walton. Fire in the Sky (1996) and The Walton Experience(1978)
- Barlowe's Guide to Extraterrestrials by Wayne Barlowe (1979)
- Chariots of the Gods: Unsolved Mysteries of the Past by Erich von Däniken (1968)
- The Cosmic Connection: An Extraterrestrial Perspective by Carl Sagan (1973)
- Diseases from Space by Fred Hoyle and Chandra Wickramasinghe (1979)
- Evolving the Alien: The Science of Extraterrestrial Life by Jack Cohen and Ian Stewart (2002)
- Expedition: Being an Account in Words and Artwork of the 2358 A.D. Voyage to Darwin IV by Wayne Douglas Barlowe (1990)
- The Flying Saucers Are Real by Donald Keyhoe (1950) Available online
- Flying Saucers from Outer Space by Donald Keyhoe (1953)
- Mirror Earth: The Search for Our Planet's Twin by Michael Lemonick (2012)
- The Mothman Prophecies by John Keel (1975)
- New Lands by Charles Fort (1925)
- Open Skies, Closed Minds by Nick Pope (1999)
- The Sirius Mystery by Robert K. G. Temple (1976)
- The Space Gods Revealed: A Close Look at the Theories of Erich von Däniken by Ronald Story (1976)
- The Spaceships of Ezekiel by Josef F. Blumrich (1974)
- UFOs: Generals, Pilots, and Government Officials Go on the Record, by Leslie Kean (2008)
- Witness to Roswell: Unmasking the Government’s Biggest Cover-Up, by Thomas J. Carey, Donald R. Schmitt, and Edgar Mitchell
- Encounter in Rendlesham Forest, by Nick Pope
- The Interrupted Journey, by John G. Fuller (1966)
- The Day After Roswell, by Philip Corso
- The Invisible College: What a Group of Scientists Has Discovered about UFO Influence on the Human Race, by Jacques Vallee
- Messengers of Deception, by Jacques Vallee (1979)
- Area 51: An Uncensored History of America’s Top Secret Military Base, by Annie Jacobsen
- The 12th Planet, by Zecharia Sitchin (1976)
Jose Arguelles and Miriam Arguelles. Mandala
Gregory Bateson. Mind and Nature: A Necessary Unity
Lawrence Blair. Rhythms of Vision: The Changing Patterns of Belief
Paul Brunton. The Wisdom of the Overself
Thomas Campbell. My Big TOE [Theory of Everything]: The Complete Trilogy
Teilhard de Chardin. The Phenomenon of Man
Jonathan Cott. The Search for Omm Sety: Reincarnation and Eternal Love
Erich von Daniken. Chariots of the Gods
Ram Dass. Be Here Now and Grist for the Mill (with Stephen Levine)
Paul Davies. Superforce: The Search for a Grand Unified Theory of Nature
The Tibetan Book of the Dead
Lao Tsu. Tao Te Ching
Buckminster Fuller. Earth, Inc.
John G. Fuller. The Interrupted Journey
Robert W. Funk and the Jesus Seminar
Edward Goldsmith. 'The Way: An Ecological World-View
Lama Anagarika Govinda. Foundations of Tibetan Mysticism
Stephen W. Hawking
Aldous Huxley. The Doors of Perception
J. Allen Hynek. The Hynek UFO Report: What the Government Suppressed and Why
William James. The Varieties of Religious Experience
Hans Jonas. The Gnostic Religion
Carl G. Jung
John C. Lilly. Programming and Metaprogramming in the Human Biocomputer
Jesse Marcel, Jr., and Linda Marcel. The Roswell Legacy: The Untold Story of the First Military Officer at the 1947 Crash Site
Robert A. Monroe
Ruth Montgomery. Aliens Among Us
Diane Morrin. Untying the Karmic Knot
Martin Muller. Prelude to the New Man: An Introduction to the Science of Being
Erich Neumann. The Great Mother: An Analysis of the Archetype
Bret Oldham. Children of the Grays and The Baby Takers
Sheila Ostrander and Lynn Schroeder. Psychic Discoveries Behind the Iron Curtain
P. D. Ouspensky. A New Model of the Universe: Principles of the Psychological Method in Its Application to Problems of Science, Religion, and Art
Elaine Pagels. The Gnostic Gospels
Raphael Patai. The Hebrew Goddess
Joseph Chilton Pierce
Yogi Ramacharaka.The Hindu-Yogi Science of Breath: A Complete Manual of the Oriental Philosophy of Breathing
Albert S. Rosales
Mike Samuels and Nancy Samuels. Seeing with the Mind’s Eye: The History, Techniques and Uses of Visualization
Isha Schwaller de Lubicz. The Opening of the Way: A Practical Guide to the Wisdom Teachings of Ancient Egypt
Leonard H. Stringfield. Situation Red: The UFO Siege
Shunryu Suzuki. Zen Mind, Beginner’s Mind
Ingo Swann. Penetration: The Question of Human and Extraterrestrial Telepathy
David V. Tansley. Subtle Body: Essence and Shadow
Peter Tompkins. The Secret Life of Plants: A Fascinating Account of the Physical, Emotional, and Spiritual Relations Between Plants and Man and Secrets of the Great Pyramid
William Mills Tompkins. Selected by Extraterrestrials: My life in the Top Secret World of UFOs, Think-Tanks and Nordic Secretaries
Joel L. Whitton and Joe Fisher. Life Between Life
Richard Wilhelm and Cary F. Baynes, translators. The I Ching, or Book of Changes
Paramahansa Yogananda. Autobiography of a Yogi
Heinrich Zimmer. Myths and Symbols of Indian Art and Civilization