Books about Life on other planets -- Fiction (sorted by popularity)
- Sword of the Seven Suns Gardner F. Fox 103 downloads
- The Desert and the Stars Keith Laumer 103 downloads
- Aide Memoire Keith Laumer 103 downloads
- Exploration Team Murray Leinster 102 downloads
- Operation Interstellar George O. Smith 100 downloads
- World of the Mad Poul Anderson 98 downloads
- The Fool David Mason 96 downloads
- Retief of the Red-Tape Mountain Keith Laumer 95 downloads
- The last space ship Murray Leinster 92 downloads
- The missionary Jesse F. Bone 92 downloads
- The Hero Elaine Wilber 92 downloads
- The overlord's thumb Robert Silverberg 91 downloads
- Stranger From Space Hannes Bok 91 downloads
- Problem Planet R. R. Winterbotham 89 downloads
- Regulations Murray Leinster 89 downloads
- Daughter Philip José Farmer 88 downloads
- Revolt of the Outworlds Stephen Marlowe 86 downloads
- The Planet That Time Forgot Donald A. Wollheim 85 downloads
- Planet of Doom Stephen Marlowe 85 downloads
- The Rebel of Valkyr Alfred Coppel 85 downloads
- Beauty interrupted Charles L. Fontenay 85 downloads
- World Without Glamor Stephen Marlowe 84 downloads
- Temptress of Planet Delight Betsy Curtis 84 downloads
- The Governor of Glave Keith Laumer 83 downloads
- Garden of Evil Margaret St. Clair 83 downloads