Books about Extraterrestrial beings -- Fiction (sorted alphabetically)
- D-99: a science-fiction novel H. B. Fyfe
- Doorstep Keith Laumer
- Double Take Wilson Parks Griffith
- Earthman Irving E. Cox
- End as a Hero Keith Laumer
- Ethicators Willard Marsh
- Exploiter's End James Causey
- Export Commodity Irving E. Cox
- Extracts from the Galactick Almanack: Music Around the Universe Laurence M. Janifer
- Feet of Clay Robert Hoskins
- Fifteen Hundred Miles an Hour Charles Dixon
- Final Glory Henry Hasse
- Founding Father Jesse F. Bone
- Gift Bearer Charles L. Fontenay
- green girl Jack Williamson
- Green Grew the Lasses Ruth Laura Wainwright
- Green World Hal Clement
- Growing up on Big Muddy Charles V. De Vet
- guest rites Robert Silverberg
- Half past Alligator Donald Colvin
- Hold Onto Your Body! Richard O. Lewis
- If You Was a Moklin Murray Leinster
- Indirection Everett B. Cole
- Invader Alfred Coppel
- Islands of Space Jr. John W. Campbell