Although not known as a science-fiction writer, Robert Louis Stevenson penned one of the genreΓÇÖs most enduring and popular classics, The Strange Case of Dr. Jekyll and Mr. Hyde. In this 1896 psychological thriller (with an earlier version in 1886), Stevenson shows the horrifying effects upon a young man, torn between puritan principles and his romantic passions, when his scientific studies release his submerged dark side. Tapping into the Faustian motif of making a deal with the devil, the novel reflects the psychological struggle Freud describes between a cultured, contained ego and libidinous,
