The 7th planet : Mercury rising
Clark, Gerald R., author.
[United States] : Findaway Voices, 2015.

Alien contact : NASA exposed

[United States] : Gravitas Ventures, 2013.

Alien earths : the new science of planet hunting in the cosmos
Kaltenegger, Lisa, 1977- author.
New York : St. Martin's Press, 2024.

Alien : global threat

[United States] : Gravitas Ventures, 2016.

Alien oceans : the search for life in the depths of space
Hand, Kevin, author, narrator.
[United States] : Princeton University Press, 2020.

Alien oceans : the search for life in the depths of space
Hand, Kevin, author, narrator.
[United States] : Princeton University Press, 2020.

All these worlds are yours : the scientific search for alien life
Willis, Jon (College teacher), author.
[United States] : Tantor Audio, 2016.

The ancient alien question : a new inquiry into the existence, evidence, and influence of ancient vi
Coppens, Philip.
[United States] : Tantor Audio, 2011.

Ancient aliens.

[United States] : A+E Networks, 2014.

Ancient aliens.

[United States] : A+E Networks, 2010.

Ancient aliens.

[United States] : History, 2020.

The eyes of the Sphinx : the newest evidence of extraterrestrial contact in ancient Egypt
Däniken, Erich von, 1935- author.
[United States] : Tantor Audio, 2011.

The case for Mars : the plan to settle the red planet and why we must
Zubrin, Robert, author.
New York : Free Press, 2021.

The case for Mars : the plan to settle the red planet and why we must
Zubrin, Robert.
[United States] : Tantor Audio, 2018.

Chariots of the gods : unsolved mysteries of the past / Erich Von Daniken ; translated by Michael He
Däniken, Erich von, 1935-
New York : Berkley Books, 1999.

Chariots of the gods : unsolved mysteries of the past
Däniken, Erich von, 1935- author.
New York : Berkley, 2018.

The eerie silence : renewing our search for alien intelligence
Davies, P. C. W.
[United States] : Tantor Audio, 2010.

Encounters with the unknown
Strieber, Whitley.
[United States] : New Dimensions Foundation, 1988.

Chariots of the gods
Däniken, Erich von, 1935-
[United States] : Tantor Audio, 2011.

Exoplanets diamond worlds, super earths, pulsar planets, and the new search for life beyond our sola
Summers, Michael, 1954-
2017.

Exoplanets : diamonds worlds, super-Earths, pulsar planets, and the new search for life beyond our s
Summers, Michael, 1954- author.
Washington, DC : Smithsonian Books, [2017]

Exoplanets : hidden worlds and the quest for extraterrestrial life
Goldsmith, Donald, author.
[United States] : Dreamscape Media, LLC, 2018.

Exoplanets : worlds without end

[United States] : Blackstone Publishing, 2021.

Extraterrestrial : the first sign of intelligent life beyond Earth
Loeb, Abraham, author.
Boston : Houghton Mifflin Harcourt, 2021.

Extraterrestrial the first sign of intelligent life beyond Earth
Loeb, Abraham.
2021.