Suddenly projected to Mars, John Carter found himself captive of the savage green men of Thark. With him was Dejah Thoris, lovely Princess of Helium. And between them and rescue lay a thousand miles of deadly enemies and unknown dangers.

"A Princess of Mars" was first published as "Under the Moons of Mars" in the All-Story (February - July 1912). The first hardcover edition was published by A.C. McClurg & Co., October 10, 1917. The dust jacket and five sepia plates were by Frank Schoonover.