Dalgard Nordis, a terran on Astra, goes through a series of adventures which reflect Andre Norton's preoccupation with social problems on a broad if simplified and the possibility of life on another planet in another solar system like Earth's. Dal people are fourth or fifth generation settlers but remember Earth well enough be disturbed by the arrival of another space ship. Its passengers, discovered and helped by Dalgard after an accident, are the cause of another discovery, the solving of the mystery of The Others, a mighty and tyrannical but supposedly lost civilization that had ruled Astra long ago. With a new threat from them overcome, the Terrans try to persuade Dalgard to return with them but he now realizes Astra is his own land. Good.