The People of the Crater
by Andre Norton
Garin Perstone is now a fighter pilot looking for a job. He was recruited as a pilot on an Antarctic expedition to investigate the anomaly near the South Pole. When three reconnaissance planes reach the area, Garin's mind is taken over by the strange force that directs his plane deep into the crater. There, he discovers an old and alien race that brings him to fight against the old evils.
