Lord of Thunder

"Why - at the height of the great dry season when neither man nor beast can long survive away from shelter and water - should all the native tribes on the planet Arzor be gathering in the sinister and almost unknown country of the Peaks? To find the answer, Hosteen Storm, a Beast Master relocated here after Terra's destruction in a galactic war, is sent into the Peaks on a mission of utmost danger." From the dust jacket of the 1962 edition (Harcourt, Brace & World, Inc.).