Books about Extraterrestrial beings -- Fiction (sorted by popularity)
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- The colour out of space H. P. Lovecraft 545 downloads
- The Sex Life of the Gods M. E. Knerr 336 downloads
- The master mind of Mars Edgar Rice Burroughs 188 downloads
- Islands of Space Jr. John W. Campbell 156 downloads
- Ten From Infinity Paul W. Fairman 143 downloads
- The Aliens Murray Leinster 129 downloads
- The Black Star Passes Jr. John W. Campbell 128 downloads
- Triplanetary E. E. Smith 116 downloads
- Pictures Don't Lie Katherine MacLean 112 downloads
- The Winds of Time James H. Schmitz 108 downloads
- Man of Many Minds E. Everett Evans 105 downloads
- Star Surgeon Alan Edward Nourse 102 downloads
- Half past Alligator Donald Colvin 100 downloads
- Meeting of the Minds Robert Sheckley 99 downloads
- D-99: a science-fiction novel H. B. Fyfe 94 downloads
- If You Was a Moklin Murray Leinster 94 downloads
- Common Denominator John D. MacDonald 86 downloads
- Last Night Out Milton A. Rothman 85 downloads
- The Green World Hal Clement 83 downloads
- The Course of Logic Lester Del Rey 80 downloads
- And Then the Town Took Off Richard Wilson 78 downloads
- Keep Your Shape Robert Sheckley 73 downloads
- The guest rites Robert Silverberg 67 downloads
- A Bad Day for Vermin Keith Laumer 67 downloads
- Circus Alan Edward Nourse 67 downloads
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