Tarzan Triumphant (1931), Edgar Rice Burroughs' fifteenth Tarzan novel, sends the ape-man to the rescue when Bolshevik agents kidnap an American archaeological expedition, including Professor Henderson and his daughter. Tracking the captors through the jungle, Tarzan discovers Midian, a hidden crater city inhabited by the bearded descendants of an ancient Christian sect. Ruled by a mad prophet who preaches that women are unclean, Midian enslaves female captives and executes dissenters. Aided by loyal warriors and great apes, Tarzan storms the city, toppling both the fanatic's tyranny and the communist plot. Blending adventure with satire of zealotry and ideology, the novel ends in hard-won triumph.