- Other worlds;: Their nature, possiblities and habitability in the light of the latest discoveries, by Garrett Putman Serviss, 1928
- Other Worlds Than Ours: The Plurality of Worlds Studied Under the Light of Recent Scientific Researches [ 1905 ] by Richard A. (Richard Anthony) Proctor, 2009-08-10
- Life on Other Worlds (Mentor Books) by Sir Harold Spencer Jones, 1966-08
- Elements of Useful Knowledge in Geography, Astronomy, and Other Sciences by J. Allbut, 2008-10-15
- Our Own and Other Worlds by Joseph Hamilton, 1903
- The Last Frontier: Imagining Other Worlds, from the Copernican Revolution to Modern Science Fiction by Karl S. Guthke, 1993-06
- Other worlds in space by F. J. Terence Maloney, 1957
- Other worlds than this, by Elena Fontany, 1930
- Other Worlds: The Search For Life in the Universe by Michael D. Lemonick, 1999-05-21
- We Are Not Alone: The Search for Intelligent Life on Other Worlds by Walter Sullivan, 1964
- Other Worlds (Illustrated Edition) (Dodo Press) by Garrett P. Serviss, 2008-05-16
- E.T. Talk: How Will We Communicate with Intelligent Life on Other Worlds? (Astronomers' Universe) by Fernando J. Ballesteros, 2010-08-19
- The Origin of the Solar System : Genesis of the Sun and Planets and Life on Other Worlds Volume 3 Sky and Telescope Library of Astronomy by Thorton; Lou Williams Page Page, 1966
- To other worlds;: Telescopes, rockets, stars by Werner Büdeler, 1954
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