Books about Life on other planets -- Fiction (sorted by popularity)
- Exploration Team Murray Leinster 109 downloads
- Eight Keys to Eden Mark Clifton 108 downloads
- The Gods of Mars Edgar Rice Burroughs 108 downloads
- The War of the Worlds H. G. Wells 108 downloads
- Pariah Planet Murray Leinster 107 downloads
- Bleekman's Planet Randall Garrett and Robert Silverberg 98 downloads
- Daughter Philip José Farmer 94 downloads
- Rebels of the Red Planet Charles L. Fontenay 91 downloads
- This World Is Taboo Murray Leinster 91 downloads
- Star Ship Poul Anderson 89 downloads
- Voodoo Planet Andre Norton 89 downloads
- No-Risk Planet Stephen Marlowe 88 downloads
- World of the Mad Poul Anderson 83 downloads
- Med Ship Man Murray Leinster 83 downloads
- Operation Interstellar George O. Smith 82 downloads
- An Earthman on Venus (Originally titled "The Radio Man") Ralph Milne Farley 82 downloads
- Aide Memoire Keith Laumer 81 downloads
- The Wind People Marion Zimmer Bradley 81 downloads
- The Frozen Planet Keith Laumer 79 downloads
- Spacerogue Robert Silverberg 79 downloads
- Survival factor Charles V. De Vet 74 downloads
- Space Blackout Sam Carson 72 downloads
- The Lunarian Professor and His Remarkable Revelations Concerning the Earth, the Moon and Mars James B. Alexander 72 downloads
- Tiger by the Tail Poul Anderson 72 downloads
- Citadel of the Green Death Robert Emmett McDowell 69 downloads