A Princess of Mars
"A Princess of Mars", the first novel in the Barsoom series, with its sequels "The Gods of Mars" and "The Warlord of Mars", form a trilogy centered upon protagonist John Carter and damsel in distress Dejah Thoris. John Carter's and Dejah Thoris's son Carthoris is also introduced as a minor character in "The Gods of Mars", as is Thuvia.