Return to Akada — John Russell Fearn

Rich widow Rita Perrivale returns to the coast of West Africa on a new expedition to the legendary lost city of Akada and its treasures. She only survived the first, disastrous expedition due to the help of Anjani, a white man, raised in the jungle by a native tribe. But Rita, hoping to be reunited with Anjani, hasn't reckoned with the treacherous Tocoto, Anjani's twin brother - and his rival for the supremacy of the Dark Continent...