of her heritage. Introduced early in the novel, she immediately becomes the love interest of John Carter. As a central character in the first three Barsoom novels, her frequent capture by various enemies, and subsequent pursuit by John Carter, is a constant motivating element in their plots. Tars Tarkas: A fierce Green Martian warrior from the Thark tribe, he is unusual among his race for his ability to experience tender emotions such as friendship and love. His emotional development stems from a forbidden love affair in his youth, when he secretly began a partnership with a Green Martian woman named Gozava. He befriends John Carter and later fights at his side. Carter helps him become Jeddak of Thark and negotiates an alliance between the Green Martians and the city-state of Helium, which results in the destruction of Helium's enemy, Zodanga. Tars Tarkas more than once displays an ironic sense of humor; he mocks John Carter's perception of himself as "a cruel green warrior" while fighting beside him, and in The Gods of Mars he comments on the disappointment of Barsoomian hopes for the afterlife. Tal Hajus: Jeddak (king) of the Tharks, who years previously had ordered Gozava's death. Sola: Daughter of Tars Tarkas and a friend of John Carter, she teaches him the Barsoomian language and the history of her race, as well as the secret of her own parentage. She appears in the immediate sequels to A Princess of Mars, but has no role in later books of the series. Sarkoja: A Green Martian woman whose intrigues resulted in the death of Gozava and who schemes against John Carter. After Carter tells Tars Tarkas about her role in Gozava's death, she is frightened into a self-imposed exile and never heard from again. Kantos Kan: A warrior of Helium who escapes a Warhoon prison with John Carter. By the beginning of the second book, Kantos Kan is the chief commander of Helium's navy. Production Background Burroughs began work on A Princess of Mars in the summer of 1911 when he was 35. He wrote most of the first half of the novel while working for his brother in a stationery company, penning the words on scratch pads produced by the business. He had been struggling for some time to establish himself as a businessman, so far with little success, and with a wife and two children to support, turned to