This is the final adventure of Carson Napier among the exotic peoples and beasts of Amtor. It is an adventure not to be missed as Napier encounters a new kind of science and a new master of alien deviltry

The Unfinished Venus Story 
Porges: Pages 1031-1032 "Burroughs had begun a new Carson of Venus story on December 2, 1941, but the bombing of Pearl Harbor five days later, and the United States' entry into the war, caused him to abandon fiction writing for two years. The Venus story, with an opening of a little more than two pages completed, describes Carson and Ero Shan, in their anotar, flying "into the unknown," their destination the city of Sanara, where Carson has left his beloved Duare. The brief section is mainly expository, referring to their adventures with the "mad Wizard of Venus," his death and the dissolving of his "malign hypnotic powers," with the final freeing of all his subjects.

The two men pass over the vast, uncharted regions of Venus. Among the series of adventures and mishaps, there is a hint of danger in the sight of "Gargantuan beasts." The story breaks off with the men excitedly discovering a ship moving on an unknown ocean beneath them: ". . . the first work of man that we had seen since taking off from Gavo."