John Carter Of Mars - Warlord Of Mars & Thuvia, Maid Of Mars

"Warlord of Mars" is a science fiction novel written by Edgar Rice Burroughs, the third of his famous Barsoom (Mars) series. "Thuvia, Maid of Mars" is the fourth of the Barsoom series. In this novel the focus shifts from John Carter, Warlord of Mars, and Dejah Thoris of Helium, protagonists of the first three books in the series, to their son, Carthoris, prince of Helium, and Thuvia, princess of Ptarth.