Books about Life on other planets -- Fiction (sorted by popularity)
- The Creatures That Time Forgot Ray Bradbury 182 downloads
- Eight Keys to Eden Mark Clifton 173 downloads
- Star Ship Poul Anderson 165 downloads
- Med Ship Man Murray Leinster 162 downloads
- Woman's touch Evelyn E. Smith 159 downloads
- The Gods of Mars Edgar Rice Burroughs 148 downloads
- Slave Planet Laurence M. Janifer 145 downloads
- The Planet Savers Marion Zimmer Bradley 142 downloads
- The great illusion Manly Banister 138 downloads
- The Masked World Jack Williamson 137 downloads
- Pariah Planet Murray Leinster 135 downloads
- Bleekman's Planet Randall Garrett and Robert Silverberg 134 downloads
- This World Is Taboo Murray Leinster 131 downloads
- A Matter of Protocol Jack Sharkey 119 downloads
- The Chemically Pure Warriors Allen Kim Lang 119 downloads
- Phantom Out of Time Nelson S. Bond 117 downloads
- An Earthman on Venus (Originally titled "The Radio Man") Ralph Milne Farley 116 downloads
- Tiger by the Tail Poul Anderson 115 downloads
- The Virgin of Valkarion Poul Anderson 113 downloads
- Citadel of Lost Ships Leigh Brackett 113 downloads
- Spacerogue Robert Silverberg 112 downloads
- No-Risk Planet Stephen Marlowe 111 downloads
- Cultural Exchange Keith Laumer 111 downloads
- Gambler's World Keith Laumer 108 downloads
- Rockabye, Grady David Mason 107 downloads