The novel was originally serialized in the magazine Blue Book from October, 1930 through April, 1931 as Tarzan, Guard of the Jungle.

[1] Tarzan, his monkey friend Nkima, and Chief Muviro and his faithful Waziri warriors prevent Soviet communists from looting the lost city of Opar.

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.

182–183, dated February–March 1970, with a script by Gaylord DuBois and art by Doug Wildey.