Dr. Jekyll explores the esoteric part of psychology and morality after analyzing that “mysterious duality of life”: good and evil. He is a virtuous person, morally correct and thinks to have everything under control. Mr. Hyde is his way to break the limits of human behavior with virtually no consequences. This experiment will seal his fate and take his sanity away. This is a distinguished novel, difficult to brand in a specific literary subgenre. Reading through its pages, the reader will find a mixture of horror, police thriller, and psychological fantasy.