Tunnel in the Sky
Robert A. Heinlein
Is She Really Going Out with Him?
Sophie Cousens
The Moment of the Magician
Alan Dean Foster
Spellsinger (4)
Cat Chaser
Elmore Leonard
N-Space
Larry Niven
Juggler of Worlds
Larry Niven; Edward M. Lerner
The integral trees: and, The smoke ring
Escape from Hell
Larry Niven; Jerry Pournelle