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A Fighting Man of Mars is an Edgar Rice Burroughs science fantasy novel, the seventh of his famous Barsoom series. Burroughs began writing it on February 28, 1929, and the finished story was first published in Blue Book Magazine as a six-part serial in the issues for April to September, 1930. It was later published as …

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.

At the Earth's Core is a 1914 fantasy novel by Edgar Rice Burroughs, the first in his series about the fictional "hollow earth" land of Pellucidar. It first appeared as a four-part serial in All-Story Weekly from April 4–25, 1914. It was first published in book form in hardcover by A. C. McClurg in July, 1922.