Sixty-five million years ago, a disastrous cataclysm eliminated three quarters of all life on Earth. Overnight, the ago of dinosaurs ended. The age of dinosaurs ended. The age of mammals had begun.

But what if history had happened differently? What if the reptiles had survived to evolve intelligent life?

Here is the story of Kerrick, a young hunter who grows to manhood among the dinosaurs, escaping at last to rejoin his own kind. His knowledge of their strange customs makes him the humans' leader...and the dinosaurs' greatest enemy.