Synopsis: From the back cover of the Ace first printing: "Spider World - Mankind once ruled planet Earth, smugly ignoring the tiny creatures crawling underfoot. Then came the cosmic catastrophe which put man at the mercy of the giant spiders, icily intelligent conquerors armed with awesome mind powers. Now, the struggle for survival begins... The Desert - The Death Lord spiders rule the Earth, herding humans like cattle. A few tribes of free men and women dwell in the desert, hiding underground, living by their wits. Now, a young warrior named Niall begins an epic search for the secrets of the spiders - secrets which might give humanity a fighting chance against the overlords..."