OX by Piers Anthony
Published 1976 Avon Paperback
Of Man and Manta Series Book #3
Summary: "Cal, Veg, and Aquilon - two men and one woman - roamed the alternate dimensions of time and space. With them were the mantas, strange flying aliens - half animal, half fungus - who could boast the keenest senes of any creatures in the universe. And with them too was the mysterious, impassive superwoman, Tamme. They were imprisoned on a hostile world dominated by savage robots. It was crucial to their very survival that each find a way back to their familiar dimensions of Earth."
256 pages
Some edge wear and creasing front and back covers. Some wear edge of title page and page after.