"Story of O" is a novel by French author Pauline Réage, published in 1954. The story follows a woman named O, who willingly submits to a life of sexual servitude and explores themes of BDSM and eroticism. O's journey takes her through various relationships and experiences that challenge her identity and desires. The book is notable for its explicit content and has sparked discussions about feminism, consent, and the nature of power in relationships. Despite its controversial themes, "Story of O" has gained a significant following and is considered a classic in erotic literature.