Renegade of Callisto
Lin Carter
 In the final adventure set on the Jovian moon Callisto, or Thanator, three comrades of series hero Jandar are lost in a damaged airship. Jungle boy Taran, Yathoon warrior Koja and their pet othode Fido, drift away from the city of Shondakar into the plains ruled by the insectoid Yathoon hordes. Taken captive by one of the hordes, they meet fellow prisoner Xara, princess of Ganatol, waylaid on her way to Shondakar to secure an alliance against the mercantile Perushtar city-states. Koja and Borak, another Yathoon prisoner, escape and find sanctuary with Koja's own horde, while Taran and Xara are saved by another airship sent by Jandar to locate the missing protagonists. Xara falls in love with Vandar, the ship's captain. Unfortunately, rescued and rescuers are quickly retaken by the Yathoon and carried away to Sargol, the hidden capital of all the insectoid hordes. Koja, who has reassumed the leadership he once held over his own horde, is there as well. He challenges the Yathoon emperor to a duel for the right to rule the combined hordes. The contest takes the form of a game of Darza (Thanatorian chess), utilizing as pieces live players who must fight to the death. Taran, Xara and Valkar become some of Koja's "pieces." The game is interrupted by Fido and other othodes, and Koja and the emperor end up fighting singly. Koja is triumphant, becoming the new emperor of the hordes, and his human companions are saved. Jandar shows up in the denouement to help celebrate and take the protagonists home to Shondakar.