Tarzan the Invincible by Edgar Rice Burroughs
Tarzan, his monkey friend Nkima, and Chief Muviro and his faithful Waziri warriors prevent Soviet communists from looting the lost city of Opar. The story also prominently features Tarzan's lion ally Jad-bal-ja.
Table of content
Chapter 5 Before the Walls of Opar
Chapter 8 The Treachery of Abu Batn
Chapter 9 In the Death Cell of Opar
Chapter 10 The Love of a Priestess
Chapter 12 Down Trails of Terror