The Ringworld Engineers
Larry Niven
Ringworld (2)
Fundación
Asimov, Isaac
Fundación (8)
The Galaxy, and the Ground Within (Wayfarers 4)
Chambers, Becky
Wayfarers (4)
The Player of Games (The Culture 2)
Iain M. Banks
The Culture (2)
The demon-haunted world: science as a candle in the dark
Carl Sagan