"Les Mystères de Paris" is a novel written by Eugène Sue and first published in 1843-1844. The story follows the adventures of Rodolphe as he navigates the underbelly of Paris, uncovering the lives of the city's marginalized and forgotten inhabitants. The novel is known for its vivid portrayal of social issues and the contrast between wealth and poverty. The book is structured as a serialized narrative, making it accessible to a wide audience during its time. It combines elements of mystery, romance, and social commentary, influencing later works in the genre. "Les Mystères de Paris" remains a significant piece of French literature and a reflection of 19th-century society.