The Warlord of Mars by Edgar Rice Burroughs, Science Fiction, Space Opera, Fantasy

Third book in Edgar Rice Burroughs's Mars series. The story picks up six months after the conclusion of THE GODS OF MARS, with our hero not knowing whether his one true love is dead or alive. It turns out that the exiled leader of the Therns has reached the trapped women to rescue his daughter -- and to seek revenge on Carter for exposing his evil cult. . . .