Slave Girl of Gor — John Norman

Tarl Cabot had resumed his allegiance to the Priest-Kings, the non-human but benevolent rulers of Earth's orbital twin planet, Gor. And accordingly Tart knew that the battle for the possession of the planet was under way--the Kurii, the beastlike invaders, had made their plans.

There was a girl, once Judy Thornton of Earth, found in the wilderness of Gor. Captured, as such lovely strangers were on that ruthless world, she was to undergo the training that would make of her a slave girl of great value. But unknown to her captors was the fact that she was a tool of the Kurii, that she carried a programmed message that imperiled the future of Gor. It was for possession of her mind and body that Priest-King and Kur-monster battled, while a planet went its way unsuspecting that its very fate was also locked within the slave collar that graced her neck.