A solo flight ends in disaster when Tarzan crashes beyond the Great Thorn Forest. He encounters the Alali and then the miniature people of Trohanadalmakus, only to become a captive in a war between rival Ant Men communities and be reduced to their size by their science.
Aircraft and expeditionary travel place Tarzan in the interwar world of the 1920s before the story plunges into one of Burroughs's most extravagant lost civilisations. The clash between modern aviation and the miniature kingdoms of the Ant Men gives the novel its distinctive mixture of technological adventure, captivity and fantasy warfare.
