"120 Days of Sodom" is a novel written by the French author Marquis de Sade in 1785. The story follows four wealthy men who isolate themselves in a remote castle, where they engage in extreme and depraved acts over a period of 120 days. The narrative explores themes of power, sexuality, and morality, often pushing the boundaries of acceptable behavior. The book was not published during de Sade's lifetime and remained largely unknown until the 20th century. It is considered one of the most controversial works in literature due to its graphic depictions of violence and sexual exploitation, sparking debates about censorship and artistic freedom.