The Day Before Forever and Thunderhead
Keith Laumer
The Calculating Stars
Mary Robinette Kowal
Sorcerer's son
Phyllis Eisenstein
The Book of Elementals (1)
The Doctor and the Rough Rider
Mike Resnick
Weird West (3)
Rendezvous With Rama
Arthur C. Clarke
Destroyer of Worlds
Mark Chadbourn
Kingdom of the Serpent (3)