Stevenson's famous exploration of humanity's basest capacity for evil Dr. Jekyll and Mr. Hyde have become synonymous with the idea of a split personality. More than a morality tale, this dark psychological fantasy is also a product of its time, drawing on contemporary theories of class, evolution, criminality, and secret lives. Also in this volume are "The Body Snatcher, " which charts the murky underside of Victorian medical practice, and "Olalla, " a tale of vampirism and "the beast within, " with a beautiful woman at its center. For more than seventy years, Penguin has been the leading publisher of classic literature in the English-speaking world. With more than 1,700 titles, Penguin Classics represents a global bookshelf of the best works throughout history and across genres and disciplines. Readers trust the series to provide authoritative texts enhanced by introductions and notes by distinguished scholars and contemporary authors, as well as up-to-date translations by award-winning translators.