This is an alphabetical version. For a subjective ranked version see: Ranked: Not Alone Out There After All? Alien Life Of Various Kinds
These are books that discuss life, out side Earth.
Philosophy:
- The Beginning of Infinity: Explanations That Transform the World by David Deutsch
- The Meaning of Human Existence by Edward O. Wilson
Fiction:
- Alien Hunters by Daniel Arenson
- Charlie and the Great Glass Elevator by Roald Dahl
- The Complete Stories and Poems by Edgar Allan Poe
- First Conquest by David VanDyke
- Hard Duty by Mark E. Cooper
- Rendezvous with Rama by Arthur C. Clarke
