На английском название : Robert Louis Stevenson's "The Strange Case of Dr. Jekyll and Mr. Hyde"
The story of two opposite halves of a single person, at the same time - moralistic parable about the duality of progress and responsibilities of science (later this theme was developed by Wells in the "Invisible Man" and "Island of Dr. Moreau"). Stevenson intelligently combined elements of NF, Gothic horror and philosophical novel. The result - a book that has generated a lot of imitations and make an image of Jack Hyde household name.