"Tarzan and the Golden Lion" by Edgar Rice Burroughs is an adventure novel first published as a serial beginning in December 1922. When Tarzan's finances become depleted, he must return to the lost city of Opar for gold. But a former housemaid has stolen his map and hired a Tarzan look-alike for her own expedition. Betrayal, drugging, and capture follow as Tarzan finds himself trapped in a legendary valley ruled by intelligent gorillas, with only his golden lion companion to help him survive.