Foundation and Empire
Isaac Asimov
Foundation (4)
Hyperion
Dan Simmons
Hyperion Cantos (1)
Foundation's Edge
Foundation (6)
Prelude to Foundation
Foundation (1)
Foundation and Earth
Foundation (7)
Nemesis: A Novel
Endymion
Hyperion Cantos (3)
The Fall of Hyperion
Hyperion Cantos (2)