John Carter desperately needed the aid of Barsoom's greatest scientist. But Ras Thavas was the prisoner of a nightmare army of his own creation -- half-humans who lived only for conquest. And in their hidden laboratory seethed a horror that could engulf all of Mars.
About the Author
Edgar Rice Burroughs (1875-1950) was an American writer best known for creating Tarzan and John Carter. He wrote science fiction, fantasy, adventure, westerns, and others. His work influenced so many people, it would be impossible to name them all, but the list includes James Cameron, Ray Bradbury, Robert A. Heinlein, Michael Crichton, Carl Sagan, George Lucas, Jack Vance, and others.