Books about Extraterrestrial beings -- Fiction (sorted by popularity)
- Keep Your Shape Robert Sheckley 69 downloads
- Peacemaker Alan Edward Nourse 68 downloads
- Indirection Everett B. Cole 67 downloads
- On the Fourth Planet Jesse F. Bone 65 downloads
- The Sentimentalists Murray Leinster 64 downloads
- A Transmutation of Muddles H. B. Fyfe 64 downloads
- The Onslaught from Rigel Fletcher Pratt 64 downloads
- The Star Mouse Fredric Brown 63 downloads
- Out Around Rigel Robert H. Wilson 62 downloads
- Boarding party Robert F. Young 62 downloads
- Sweet Tooth Robert F. Young 61 downloads
- Doorstep Keith Laumer 61 downloads
- The Course of Logic Lester Del Rey 61 downloads
- A Bad Day for Vermin Keith Laumer 58 downloads
- The silent invaders Robert Silverberg 58 downloads
- Extracts from the Galactick Almanack: Music Around the Universe Laurence M. Janifer 58 downloads
- Operation Terror Murray Leinster 57 downloads
- Savage Galahad Bryce Walton 56 downloads
- Amateur in Chancery George O. Smith 56 downloads
- The Invader Alfred Coppel 56 downloads
- One Against the Moon Donald A. Wollheim 56 downloads
- Star-Crossed Lover William W. Stuart 55 downloads
- Beside the golden door Henry Slesar 55 downloads
- Birds of a Feather Robert Silverberg 55 downloads
- Founding Father Jesse F. Bone 55 downloads