Books about Extraterrestrial beings -- Fiction (sorted by popularity)
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- The colour out of space H. P. Lovecraft 653 downloads
- 30-day wonder Richard Wilson 559 downloads
- The Sex Life of the Gods M. E. Knerr 472 downloads
- Triplanetary E. E. Smith 219 downloads
- Islands of Space Jr. John W. Campbell 210 downloads
- The master mind of Mars Edgar Rice Burroughs 210 downloads
- The Black Star Passes Jr. John W. Campbell 202 downloads
- The Aliens Murray Leinster 200 downloads
- The Star Mouse Fredric Brown 200 downloads
- Pictures Don't Lie Katherine MacLean 196 downloads
- Star Surgeon Alan Edward Nourse 172 downloads
- Citadel of the Star Lords Edmond Hamilton 155 downloads
- The Onslaught from Rigel Fletcher Pratt 149 downloads
- The Winds of Time James H. Schmitz 148 downloads
- Beside the golden door Henry Slesar 142 downloads
- The Measure of a Man Randall Garrett 139 downloads
- Keep Your Shape Robert Sheckley 130 downloads
- Doorstep Keith Laumer 127 downloads
- Daughter Philip José Farmer 125 downloads
- If You Was a Moklin Murray Leinster 123 downloads
- One Against the Moon Donald A. Wollheim 122 downloads
- Ten From Infinity Paul W. Fairman 121 downloads
- Man of Many Minds E. Everett Evans 120 downloads
- The silent invaders Robert Silverberg 118 downloads
- And Then the Town Took Off Richard Wilson 117 downloads
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