Fire Throne Mountain

Vassa is a planet of massive plains, green hills, and deep blue seas and one destined to play host to a horrifying conflict. Arriving on the planet, Earth colonists are immediately and relentlessly pursued by ruthless aliens. A desperate battle for the planet begins. Retreating, the Earthlings are pursued from plateau country to the wild mountainous region by mutant nomads under the aliens' mind control. But it is her; among the towering black crags, that they will discover the secret of survival.