So Long, and Thanks for All the Fish
Douglas Adams
Hitchhiker's Guide to the Galaxy (4)
Life, the Universe and Everything
Hitchhiker's Guide to the Galaxy (3)
The Restaurant at the End of the Universe
Hitchhiker's Guide to the Galaxy (2)
Flight of Exiles
Ben Bova
Exiles (Ben Bova) (2)
Trader to the Stars
Poul Anderson
Nicholas Van Rijn (2)