The "Aubrey–Maturin" series is a collection of historical novels written by Patrick O'Brian. It follows the adventures of Captain Jack Aubrey, a British naval officer, and his close friend, Dr. Stephen Maturin, a ship's surgeon and intelligence agent, during the early 19th century. The series is set against the backdrop of the Napoleonic Wars and explores themes of friendship, loyalty, and the complexities of naval warfare. The series consists of twenty novels, starting with "Master and Commander" and concluding with "Blue at the Mizzen." Known for its detailed portrayal of life at sea, the books combine rich character development with accurate historical context, making them popular among both history enthusiasts and fiction readers.