Heart of Darkness
Heart of Darkness (1899) is a novella by Polish-English novelist Joseph Conrad about a narrated voyage up the Congo River into the Congo Free State in the so-called "heart of Africa". Charles Marlow, the narrator, tells his story to friends aboard a boat anchored on the River Thames. This setting provides the frame for Marlow's story of his obsession with the ivory trader Kurtz, which enables Conrad to create a parallel between what Conrad calls "the greatest town on earth", London, and Africa as places of darkness.
The Dark Heart of Time
The Dark Heart of Time: A Tarzan novel is a novel by American writer Philip José Farmer, authorized by Edgar Rice Burroughs, Inc. Published in 1999, the book was first announced under the title "Tarzan's Greatest Secret" in 1997. A 2018 reissue of the novel will mark the book's first hardcover edition, and will be retitled as "Tarzan and the Dark Heart of Time".