Exiles at the Well of Souls — Jack L. Chalker

WAR ON THE WELL WORLD

Antor Trelig, archvillain and head of the Sponge Syndicate, had captured Obie, a supercomputer that could control all matter and all worlds. With Obie's help--willing or unwilling --Trelig would become omnipotent...and he was sure nothing could stop him now.

Against him, the Council had only one weapon--Mawd Chang, the amoral female adventurer who had trained herself to be humanity's master criminal. They offered her any reward if she succeeded. For failure, there was certain, horrible death.

Neither Trelig nor Mavra had counted on being drawn across space to the Well World, master planet of the ancient Markovians. There, in new--alien--bodies, they were faced with countless bizarre ecologies. And there they were caught up in a battle of intrigue where strange races fought for control of the Universe!