Except instead of a Peter Parker/ Spider-Man deal, Dr. Jekyll went in the opposite direction and created an evil alter ego via some mysterious potion. His alter ego, Edward Hyde, who has a completely different appearance and personality, gets to do all the fun and illegal things that Jekyll, or any normal person, can’t. Although we don’t get the juicy details, it’s pretty clear that Mr. Hyde is a pretty perverse, wicked, sinful, foul guy— not the kind of person you want to meet in a dark alley.
Apparently there’s some sort of consequence to all this evildoing, what with Hyde taking over and everyone dying . So it’s best not to try Dr. Jekyll’s experiment at home. Read the text instead, because if you haven’t figured it out already, the point of this book is so sharp we could spear fish with it: all work and no play makes Dr. Jekyll a dull boy, and all play and no work makes Mr. Hyde a raging psychopath.
Although Dr. Jekyll and Mr. Hyde is widely recognized as a monumental piece of fiction, Stevenson's concept of duality within human identity was not completely originally. In fact, he had encountered precursors to his tale long before he wrote the novel. Most frequently as influential to the development of Stevenson's work are . Hoffman's The Devil's Elixirs (1816), Thomas Jefferson Hogg's The Private Memoirs and Confessions of a Justified Sinner (1824), Edgar Allan Poe's William Wilson (1839), and most significantly, Theophile Gautier's Le Chevalier Double (1840). Gautier's story centers on the protagonist, Oluf, who has a double nature and leads a tormented life, much like Jekyll and Hyde.