The idea for Robert Louis Stevenson's immortal masterpiece of psychological terror sprang from the deepest recesses of his own subconscious--a nightmare from which his wife awakened him. He wrote it as a stark yet complex tale whose popularity has endured for more than a century, making the phrase "Jekyll and Hyde" synonymous with man's internal war between good and evil. Brilliantly anticipating modern psychology, Stevenson's story of the kindly scientist who drinks a potion that nightly transforms him into a stunted, evil version of himself is a tale of incomparable suspense and horror.