The Currents of Space
Isaac Asimov
Galactic Empire Trilogy (2)
Pebble in the Sky
Galactic Empire Trilogy (3)
The Many Coloured Land
Julian May
Pliocene Exiles (1)
The Golden Torc
Pliocene Exiles (2)
The Nonborn King
Pliocene Exiles (3)
The Adversary
Pliocene Exiles (4)