Books about Life on other planets -- Fiction (sorted by popularity)
- Med Ship Man Murray Leinster 161 downloads
- The great illusion Manly Banister 161 downloads
- Star Ship Poul Anderson 157 downloads
- The Radio Planet Ralph Milne Farley 154 downloads
- Eight Keys to Eden Mark Clifton 146 downloads
- This World Is Taboo Murray Leinster 139 downloads
- Pariah Planet Murray Leinster 137 downloads
- Bleekman's Planet Randall Garrett and Robert Silverberg 135 downloads
- Slave Planet Laurence M. Janifer 135 downloads
- The Masked World Jack Williamson 130 downloads
- No-Risk Planet Stephen Marlowe 128 downloads
- Spacerogue Robert Silverberg 123 downloads
- The Planet Savers Marion Zimmer Bradley 121 downloads
- The Gods of Mars Edgar Rice Burroughs 119 downloads
- The overlord's thumb Robert Silverberg 116 downloads
- Planet of Doom Stephen Marlowe 112 downloads
- The Virgin of Valkarion Poul Anderson 110 downloads
- Cultural Exchange Keith Laumer 109 downloads
- Exploration Team Murray Leinster 108 downloads
- World of the Mad Poul Anderson 107 downloads
- Between the dark and the daylight Algis Budrys 104 downloads
- Revolt of the Outworlds Stephen Marlowe 104 downloads
- The missionary Jesse F. Bone 103 downloads
- The Hero Elaine Wilber 103 downloads
- Stranger From Space Hannes Bok 103 downloads