Tarzan and the Lost Empire
by Edgar Rice Burroughs
Tarzan and a young German find a lost relic of the Roman Empire hidden in the mountains of Africa. This novel is notable for the introduction of Nkima, who served as Tarzan's monkey companion, and for a later series of Tarzan stories. He also reintroduces Muviro, first seen in Tarzan and the Golden Lion, as the chief pillar of Tarzan's warriors.