Mind Wizards of Callisto
Lin Carter
 A force of four airships bearing Jonathan Dark (Jandar) and his allies explores the unknown far side of the Jovian moon of Callisto (or Thanator), to seek and destroy Kuur, the secret stronghold of the evil Mind Wizards. The fleet is attacked by a flock of flying creatures called Zarkoons, and Jandar and the cabin boy Tomar are captured. Flown to the Zarkoons' lair, they meet another captive, the jungle girl Ylana, with whom they manage to escape. A flier piloted by Jandar's allies Lukor and Koja spots and retrieves them, but damaged by the pursuing Zarkoons it subsequently crash lands. The five find themselves in the Cor Az, forest home of the Cave People, Ylana's tribe, where all but Ylana are again imprisoned, the Cave People being under the thumb of the enemy. With Ylana's assistance they escape once more, only to be retaken and held for the Mind Wizards. Their ultimate fate is a mystery. An airship from the fleet later finds the memoir Jandar composed in captivity and returns with it to the civilized hemisphere of Thanator, whence it is afterwards teleported to Earth to become the basis of the present volume. The other three ships continue the quest for Kuur, but nothing has been heard from them as of the time of the last notation on the manuscript. With this cliffhanger the novel ends.