Quintaglio

The Quintaglio Ascension Trilogy is a series of novels written by Canadian science fiction author Robert J. Sawyer. The books depict an Earth-like world on a moon which orbits a gas giant, inhabited by a species of highly evolved, sentient Tyrannosaurs, among various other creatures from the late Cretaceous period, imported to this moon by aliens 65 million years prior to the story. The series consists of three books: Far-Seer, Fossil Hunter, and Foreigner.

Far-Seer is the first book in the Quintaglio Ascension.

Sixty-five million years ago, aliens transplanted Earth's dinosaurs to another world. Now, intelligent saurians -- the Quintaglio -- have emerged. Afsan, the Quintaglio counterpart of Galileo, must convince his people of the truth about their place in the universe before astronomical forces rip the dinosaurs' new home apart.

Fossil Hunter is the second book in the series.

Toroca, a Quintaglio geologist (and son of Afsan, from the previous book), is under attack for his controversial theory of evolution. But the origins of his people turn out to be more complex than he ever 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 inherited from their Tyrannosaur ancestors will destroy the last survivors of Earth's prehistoric past.

Foreigner is the final book in the series.

In Far-Seer and Fossil Hunter, we met the Quintaglios, a race of intelligent dinosaurs and learned the threat to their very existence. Now they must quickly advance from a culture equivalent to our Renaissance to the point where they can leave their world.

The Quintaglio are a fictional species of sentient theropods which first appeared in Robert J. Sawyer's short story "Uphill Climb", and later on starred in his Quintaglio Ascension Trilogy. Descended from earth's dinosaurs, (specifically, Tyrannosaurs), they live on a moon orbiting a gas giant that they refer to as "The Face of God".

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Wikipedia