Books about Extraterrestrial beings -- Fiction (sorted by popularity)
- A Transmutation of Muddles H. B. Fyfe 95 downloads
- Peacemaker Alan Edward Nourse 94 downloads
- The green girl Jack Williamson 94 downloads
- The Ultimate Eve H. Sanford Effron 92 downloads
- A trace of memory Keith Laumer 92 downloads
- The Klygha H. B. Fyfe 92 downloads
- A Little Knowledge R. R. Winterbotham 89 downloads
- Short Snorter Charles Einstein 89 downloads
- Operation Terror Murray Leinster 88 downloads
- Sweet Tooth Robert F. Young 85 downloads
- Feet of Clay Robert Hoskins 85 downloads
- The Monster That Threatened the Universe R. R. Winterbotham 84 downloads
- Threlkeld's Daughter James Bell 84 downloads
- Savage Galahad Bryce Walton 84 downloads
- The Lonely Judith Merril 84 downloads
- The Useless Bugbreeders James Stamers 83 downloads
- The Course of Logic Lester Del Rey 82 downloads
- On the Fourth Planet Jesse F. Bone 82 downloads
- The Green World Hal Clement 81 downloads
- Out Around Rigel Robert H. Wilson 80 downloads
- The Test Colony Winston K. Marks 78 downloads
- Second Landing F. L. Wallace 78 downloads
- Quest's End Basil Wells 78 downloads
- Special Delivery Kris Neville 78 downloads
- Half past Alligator Donald Colvin 78 downloads