Heart of Darkness and The Secret Sharer

Heart of Darkness is a novella written by Polish-born writer
Joseph Conrad (born Józef Teodor Konrad Korzeniowski). Before its 1902
publication, it appeared as a three-part series (1899) in Blackwood's Magazine.
It is widely regarded as a significant work of English literature and part of
the Western canon.

The Secret Sharer is a novella written by Joseph Conrad in
1909, and first published in book form in 1912, though it had appeared in
Harper’s before then. It contains a theme typical for Conrad; he is a solitary
character challenged from external and internal agents. The story was filmed as
a segment of the 1952 film Face to Face.

— Excerpted from Wikipedia, the free encyclopedia.