"La Reina del Sur" is a Spanish-language novel written by author Arturo Pérez-Reverte. It tells the story of Teresa Mendoza, a young Mexican woman who rises to power in the male-dominated world of drug trafficking. After her boyfriend is murdered, she flees to Spain, where she becomes a formidable drug lord. The novel was adapted into a successful television series, also titled "La Reina del Sur," starring Kate del Castillo as Teresa. The show gained popularity for its gripping storyline and strong female lead, highlighting themes of survival, power, and resilience in a dangerous environment.