Tarzan and the Jewels of Opar (Tarzan #5)
Author: Edgar Rice Burroughs
Desc: Here Tarzan returns to Opar the source of the gold for lost Atlantis. Ages ago Atlantis sunk beneath the waves -- but the denizens of Opar still mine the gold of this lost colony. Tarzan following greedy pair -- one Belgian one Arab -- into the jungle where they stumble into the lost city. Bad enough -- and then Tarzan injures his head in a fight and loses his memory. That's great news for La the high priestess for the Flaming God who's had a serious crush on the apeman since their first encounter. But the priests who work for her have other ideas: they don't intend to allow Tarzan to escape their sacrificial knives a second time.