Tarzan the Invincible is a novel by American writer Edgar Rice Burroughs, the fourteenth in his series of twenty-four books about the title character Tarzan. The novel was originally serialized in the magazine Blue Book from October, 1930 through April, 1931 as Tarzan, Guard of the Jungle.[1]
Due to Tarzan's earlier expeditions to Opar, rumors of the lost city's existence have become widespread enough that a Communist-led expedition heads there, seeking its gold to finance a plot to embroil France and Italy in a colonial war. Tarzan, discovering their presence and purpose in his domain, arrives in Opar ahead of them, only to find his ally Queen La overthrown and her treacherous subordinate Oah in power as high priestess, supported by Dooth, successor to La's deceased enemy Cadj. Tarzan frees La, and eventually, after various adventures, he and his Waziri warriors thwart the Communist plot and again restore La to her position. Oah and Dooth both perish.
^Bleiler, Everett (1948). The Checklist of Fantastic Literature. Chicago: Shasta Publishers. p. 67.
Chalker, Jack L.; Mark Owings (1998). The Science-Fantasy Publishers: A Bibliographic History, 1923-1998. Westminster, MD and Baltimore: Mirage Press, Ltd. p. 133.
