Fossil Hunter (The Quintaglio Ascension Book 2)

Toroca, a Quintaglio geologist, is under attack for his controversial new theory of evolution. But the origins of his people turn out to be more complex than even he imagined, for he soon discovers the wreckage of an ancient starship -- a relic of the aliens who transplanted Earth's dinosaurs to this solar system. Now Toroca must convince Emperor Dybo that evolution is true; otherwise, the territorial violence the Quintaglios inherited from their tyrannosaur ancestors will destroy the last survivors of Earth's prehistoric past.

ROBERT J. SAWYER has won the Hugo, Nebula, John W. Campbell Memorial, Seiun, and Aurora Awards, all for best science fiction novel of the year. His novels include Hominids, Rollback, Wake, and FlashForward (basis for the TV series).