The Warlord of Mars

John Carter discovers that a First Born knows the secret of the Temple of the Sun and he and the Holy Hekkador Matai Shang want to rescue the Holy Thern's daughter; who is imprisoned with Dejah Thoris and another Barsoomian princess; Thuvia of Ptarth. John Carter follows them in the hope of liberating his beloved wife. His antagonists flee to the north; taking the three women along. Thereafter John Carter follows them untiring into the north polar regions where he discovers more fantastic creatures and ancient; mysterious Martian races. These he overcomes in battle; and is later proclaimed "Warlord of Barsoom" by his allies. This book is the last to feature Tars Tarkas; John Carter's ally; in any major role; indeed; the green Barsoomians of whom Tars Tarkas is an oligarch disappear altogether from most of the later novels.