Edgar Rice Burroughs's Tarzan, Book 5 RETURN OF THE SAVAGE LORD. The earthquake struck when Tarzan was in the forbidden vaults of Opar -- the crypts piled high with the gold of Lost Atlantis. In the tumult, Tarzan was wounded in the head -- leaving him without memory of his wife or home, only with what memory he had had as a child among the savage apes who reared him. (Jacketless library hardcover.)