Fundamental Astronomy
Hannu Karttunen & Pekka Kröger & Heikki Oja & Markku Poutanen & Karl Johan Donner
Sternenflüge
Larry Niven & Gregory Benford
Planetenwanderer
George R. R. Martin
Ringworld's Children
Larry Niven
Ringworld (4)
Come as You Are
Emily Nagoski