Books about Life on other planets -- Fiction (sorted by popularity)
- Med Ship Man Murray Leinster 159 downloads
- The great illusion Manly Banister 155 downloads
- The Radio Planet Ralph Milne Farley 150 downloads
- Star Ship Poul Anderson 147 downloads
- This World Is Taboo Murray Leinster 140 downloads
- Slave Planet Laurence M. Janifer 137 downloads
- Bleekman's Planet Randall Garrett and Robert Silverberg 132 downloads
- Eight Keys to Eden Mark Clifton 131 downloads
- Spacerogue Robert Silverberg 130 downloads
- Pariah Planet Murray Leinster 127 downloads
- No-Risk Planet Stephen Marlowe 121 downloads
- Between the dark and the daylight Algis Budrys 120 downloads
- The overlord's thumb Robert Silverberg 115 downloads
- The Gods of Mars Edgar Rice Burroughs 112 downloads
- An Earthman on Venus (Originally titled "The Radio Man") Ralph Milne Farley 112 downloads
- The Masked World Jack Williamson 111 downloads
- The missionary Jesse F. Bone 108 downloads
- The Planet Savers Marion Zimmer Bradley 107 downloads
- Tiger by the Tail Poul Anderson 106 downloads
- Exploration Team Murray Leinster 105 downloads
- World of the Mad Poul Anderson 104 downloads
- Revolt of the Outworlds Stephen Marlowe 103 downloads
- The Frozen Planet Keith Laumer 103 downloads
- The Governor of Glave Keith Laumer 102 downloads
- The last days of the captain Kate Wilhelm 101 downloads