- Neil Badmington – Alien Chic: Posthumanism and the Other Within (2004)
- Debbora Battaglia – E.T. Culture: Anthropology in Outerspaces (2005)
- Howard Blum – Out There: The Government’s Secret Quest for Extraterrestrials (1990)
- Bridget Brown – They Know Us Better Than We Know Ourselves: The History and Politics of Alien Abduction (2007)
- C.D.B. Bryan – Close Encounters of the Fourth Kind (1995)
- Thomas E. Bullard – The Myth and Mystery of UFOs (2010)
- Susan A. Clancy – Abducted: How People Come to Believe They Were Kidnapped by Aliens (2005)
- Jerome Clark – Unexplained!: Strange Sightings, Incredible Occurrences, and Puzzling Physical Phenomena (1993)
- Jerome Clark – Strange and Unexplained Phenomena (1995)
- Jerome Clark – The Unidentified: Notes Toward Solving The Ufo Mystery (1975)
- Ardy Sixkiller Clarke – Space Age Indians: Their Encounters with the Blue Men, Reptilians, and Other Star People (2019)
- Roy Craig – UFOs: An Insider’s View of the Official Quest for Evidence (1995)
- Douglas Curran – In Advance of the Landing: Folk Concepts of Outer Space (1986)
- David Darlington – Area 51: The Dreamland Chronicles (1997)
- Jodi Dean – Aliens in America (1998)
- Brenda Denzler – The Lure of the Edge: Scientific Passions, Religious Beliefs, and the Pursuit of UFOs (2001)
- Ann Druffel – How to Defend Yourself Against Alien Abduction (1998)
- Charles River Editors – The Robertson Panel: The History and Legacy of the Secret Government Committee that Investigated UFO Sightings in America (2020)
- Bill Ellis – Aliens, Ghosts, and Cults: Legends We Live (2001)
- Charles F. Emmons – At the Threshold: UFO’s, Science, and the New Age (1961)
- Charles Fort – The Book of the Damned (1919)
- Timothy Good – Above Top Secret: The Worldwide UFO Cover-up (1987)
- Irene Granchi – UFOs & Abductions in Brazil (1995)
- David Grinspoon – Lonely Planets: The Natural Philosophy of Alien Life (2003)
- Stefan Helmreich – Sounding the Limits of Life: Essays in the Anthropology of Biology and Beyond (2015)
- Allan Hendry, J. Allen Hynek – The UFO Handbook: A Guide to Investigating, Evaluating and Reporting UFO Sightings (1979)
- Al Hidell – The Complete Conspiracy Reader: From the Deaths of JFK and John Lennon to Government-Sponsored Alien Coverups (2003)
- Cynthia Hind – UfOs: African Encounters (1982)
- Ion Hobana – UFO’s From Behind The Iron Curtain (1975)
- J. Allen Hynek – The UFO experience – A scientific inquiry (1972)
- David M. Jacobs – The UFO Controversy in America (1975)
- David M. Jacobs – UFOs and Abductions: Challenging the Borders of Knowledge (2000)
- Anthony Joseph, Lauri Ramey – The African Origins of UFOs (2006)
- C.G. Jung – Flying Saucers: A Modern Myth of Things Seen in the Skies (1958)
- Leslie Kean – UFOs: Generals, Pilots and Government Officials Go on the Record (2010)
- Jeffrey J. Kripal – Authors of the Impossible: The Paranormal and the Sacred (2010)
- Susan Lepselter – The Resonance of Unseen Things: Poetics, Power, Captivity, and UFOs in the American Uncanny (2016)
- James R. Lewis – The Gods Have Landed: New Religions from Other Worlds (1995)
- Michael Lieb – Children of Ezekiel: Aliens, UFOs, the Crisis of Race, and the Advent of End Time (1998)
- John E. Mack – Abduction: Human Encounters with Aliens (1994)
- Terry Matheson – Alien Abductions: Creating a Modern Phenomenon (1998)
- Michael A.G. Michaud – Contact with Alien Civilizations: Our Hopes and Fears about Encountering Extraterrestrials (2006)
- Christopher Partridge – UFO Religions (2003)
- Diana Walsh Pasulka – American Cosmic: UFOs, Religion, Technology (2019)
- Phil Patton – Dreamland: Travels Inside the Secret World of Roswell and Area 51 (1998)
- Curtis Peebles – Watch the Skies! A Chronicle of the Flying Saucer Myth (1994)
- Jenny Randles – The UFOs That Never Were (2000)
- Andrea Pritchard – Alien Discussions: Proceedings of the Abduction Study Conference (1995)
- David G. Robertson, Craig Martin, James Cox, Steven J. Sutcliffe – UFOs, Conspiracy Theories and the New Age: Millennial Conspiracism (2016)
- Carl Sagan, Iosif Shklovsky – Intelligent Life in the Universe (1966)
- Benson Saler – UFO Crash at Roswell: The Genesis of a Modern Myth (1997)
- Kathleen Stewart – A Space on the Side of the Road: Cultural Poetics in an Other America (1996)
- Keith Thompson – Angels and Aliens (1991)
- Diana G. Tumminia – Alien Worlds: Social and Religious Dimensions of Extraterrestrial Contact (2007)
- Jacques F. Vallée – Confrontations: A Scientist’s Search for Alien Contact (Alien Contact Trilogy) (1990)
- Jacques F. Vallée – Dimensions: A Casebook of Alien Contact (Alien Contact Trilogy) (1988)
- Jacques F. Vallée – Revelations: Alien Contact and Human Deception (Alien Contact Trilogy) (1992)
- Jacques F. Vallée – The Invisible College: What a Group of Scientists Has Discovered About UFO Influences on the Human Race (1975)
- Jacques F. Vallée – UFO Chronicles of the Soviet Union: A Cosmic Samizdat (1992)
See also Non-fiction on conspiracy theories & conspiracies