Les mystères de Paris is a four-volume book series by French author Eugene Xu. This novel-feuilleton is a classic representative of the folk realism genre, where the author describes the social life of Paris in the 19th century and exposes its dark sides. In the fourth volume, the reader will go on an exciting journey to the border of good and evil, where the heroes face new challenges and secrets of the city. Les mystères de Paris, Tome IV is an exciting literary masterpiece filled with unexpected twists and turns that helps the reader better understand the social problems and moral dilemmas of his time.