Books about Life on other planets -- Fiction (sorted by popularity)
- Sword of Fire Robert Emmett McDowell 55 downloads
- The Bloodhounds of Zirth Lloyd Palmer 55 downloads
- The Un-Reconstructed Woman Hayden Howard 55 downloads
- Prodigal Weapon Bill Garson 54 downloads
- Passage to Planet X Henry Hasse 54 downloads
- Hunt the Hog of Joe Robert E. Gilbert 53 downloads
- Black Priestess of Varda Erik Fennel 53 downloads
- As It Was Paul L. Payne 53 downloads
- Rockabye, Grady David Mason 52 downloads
- The Earth Quarter Damon Knight 52 downloads
- When Whirlybirds Call Frank Banta 51 downloads
- The Women-Stealers of Thrayx Fox B. Holden 50 downloads
- Planet of Dread Dwight V. Swain 49 downloads
- Survival factor Charles V. De Vet 47 downloads
- Meleager : A fantasy Herbert M. Vaughan 47 downloads
- "Utopia? Never!" Thomas M. Disch 46 downloads
- Fairyland planet John Silletto 46 downloads
- Világok harca : Mars-lakók a földön (Hungarian) H. G. Wells 45 downloads
- Beauty interrupted Charles L. Fontenay 45 downloads
- Steel Giants of Chaos James R. Adams 45 downloads
- The Devolutionist and the Emancipatrix Homer Eon Flint 44 downloads
- The Lunarian Professor and His Remarkable Revelations Concerning the Earth, the Moon and Mars James B. Alexander 43 downloads
- Children of the Chronotron S. J. Byrne 43 downloads
- Palos of the Dog Star Pack J. U. Giesy 41 downloads
- Bunzo Farewell Charles V. De Vet 40 downloads