The Strange Case of Dr. Jekyll and Mr. Hyde

The Strange Case of Dr Jekyll and Mr Hyde is a gothic novella by Scottish author Robert Louis Stevenson, first published in 1886.
(from wikipedia.org)

Robert Louis Stevenson (1850 - 1894) was a Scottish novelist and travel writer, most noted for Treasure Island, Kidnapped, Strange Case of Dr Jekyll and Mr Hyde, and A Child's Garden of Verses.