Star Born by Andre Norton

The dull pain which throbbed through Dalgard's skull with every beat of his heart was confusing, and it was hard to think clearly. But the colony scout, soon after he had fought his way back to consciousness, had learned that he was imprisoned somewhere in the globe ship. Just as he now knew that he had been brought across the sea from the continent on which Homeport was situated and that he had no hope of rescue.

He had seen little of his captors, and the guards, who had hustled him from one place of imprisonment to another, had not spoken to him, nor had he tried to communicate with them. At first he had been too sick and confused, then too wary. These were clearly Those Others and the conditioning which had surrounded him from birth had instilled in him a deep distrust of the former masters of Astra.