The classic Philip Jose Farmer
Philip Jose Farmer
Slant
Greg Bear
The End of All Things
John Scalzi
Old Man's War (6)
Blindsight
Robert Silverberg
The Macedonian Hazard
Eric Flint & Paula Goodlett & Gorg Huff
Alexander Series (2)
The Alexander Inheritance
Eric Flint & Gorg Huff & Paula Goodlett
Alexander Series (1)