Heart of Darkness, the novella by Joseph Conrad, is essentially a multi-layered narrative. The Narrator describes a night spent on a ship in the mouth of the Thames River in England.
Marlow, one of the men on board, tells of his time spent as a riverboat pilot in the Belgian Congo. On one hand it is also a peek into the unconscious of man where darkness resides silently, and on the other, it also brings to mind the glimpses of Dantes Inferno i.e.
In a very powerful manner, Conrad lays before us the story evoking subjective impressions, as the characters of his story are obscure and their tales are only half-told. Masterly blend of adventure, character development, psychological penetration.