Synthetic Men of Mars

"Synthetic Men of Mars" is a science fiction novel written by Edgar Rice Burroughs. Published in 1940, it is the ninth book in Burroughs "Barsoom" series, also known as the John Carter of Mars series. The story is set on the fictional planet Mars (Barsoom) and continues the adventures of John Carter, a Confederate soldier transported to Mars, as he navigates the conflicts and intrigues of the Martian civilizations.