Citizen of the Galaxy
Robert A. Heinlein
Starship Liberator
David VanDyke
Galactic Liberation (1)
The Flavors of Other Worlds: 13 Science Fiction Tales from a ...
Alan Dean Foster
Ultima
Stephen Baxter
Proxima (2)
Essays in Humanism
Albert Einstein
The Nature of the Physical World: Gifford Lectures
Arthur S. Eddington