Books about Extraterrestrial beings -- Fiction (sorted by popularity)
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- The colour out of space H. P. Lovecraft 682 downloads
- The Sex Life of the Gods M. E. Knerr 445 downloads
- The Black Star Passes Jr. John W. Campbell 237 downloads
- The master mind of Mars Edgar Rice Burroughs 215 downloads
- Star Surgeon Alan Edward Nourse 209 downloads
- Islands of Space Jr. John W. Campbell 208 downloads
- The Aliens Murray Leinster 201 downloads
- The green girl Jack Williamson 161 downloads
- Ten From Infinity Paul W. Fairman 160 downloads
- Triplanetary E. E. Smith 153 downloads
- 30-day wonder Richard Wilson 151 downloads
- If You Was a Moklin Murray Leinster 148 downloads
- Pictures Don't Lie Katherine MacLean 144 downloads
- Beside the golden door Henry Slesar 128 downloads
- The Winds of Time James H. Schmitz 125 downloads
- The silent invaders Robert Silverberg 124 downloads
- Doorstep Keith Laumer 123 downloads
- The Sentimentalists Murray Leinster 120 downloads
- A Bad Day for Vermin Keith Laumer 117 downloads
- Man of Many Minds E. Everett Evans 117 downloads
- Birds of a Feather Robert Silverberg 116 downloads
- Meeting of the Minds Robert Sheckley 113 downloads
- The Onslaught from Rigel Fletcher Pratt 112 downloads
- Operation Terror Murray Leinster 111 downloads
- Citadel of the Star Lords Edmond Hamilton 110 downloads
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