Summary:

This is the tenth book in the Tarzan series. Tarzan, the king of the jungle, enters an isolated country called Minuni, inhabited by a people four times smaller than himself, the Minunians, who live in magnificent city-states which frequently wage war against each other. Tarzan befriends the king and the prince of one such city-state, Trohanadalmakus, and joins them in war against the onslaught of the army of Veltopismakus, their warlike neighbours. He is captured on the battle-ground and taken prisoner by the Veltopismakusians, whose scientist Zoanthrohago conducts an experiment reducing him to the size of a Minunian, and the ape-man is imprisoned and enslaved among other Trohanadalmakusian prisoners of war. In the dungeons of Veltopismakus, he meets Komodoflorensal, and together they make a daring escape. Esteban Miranda, who had been imprisoned in the village of Obebe, the cannibal, at the end of the previous novel, Tarzan and the Golden Lion, also appears in this adventure.