The good Dr. Jekyll a kind of philanthropist obsessed with dual personality (good and evil), is developing a drug to separate his good side from his evil. In his secret laboratory, he tries. After frightful suffering he becomes Hyde. Nothing holds him and he starts to roam the streets of London. After injection of the serum, it becomes sadistic, perverse and murderous. it is the devil himself. This fabulous new Robert Louis Stevenson is a work about the split personality. Early in the novel Mister Utterson a London solicitor soon realize that his old friend Dr. Jekyll has injected a product transforming it into a monster. This hurts a girl frequents low cartiers and brothels. I will not reveal to you the end. The book is very short. As several new or horror novels, he was adapted many times in film. Some examples: "Dr. Jekyll and Mr. Hyde" by Victor Fleming with Spencer Tracy, "Dr. Jerry and Mister Love" with Jerry Lewis (comedy) or France, "The Testament of Dr. Cordelier" by Jean Renoir Jean-Louis Barrault. This short novel is a masterpiece of literature Fantasy and literature tout court. The Victorian era was a true cradle of creation (Dracula etc ...). I recommend it of course. Adanson marco.