The "Aubrey-Maturin" series is a collection of historical novels written by Patrick O'Brian. Set during the early 19th century, the series 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. The books explore themes of friendship, loyalty, and the complexities of naval warfare. The series consists of twenty novels, beginning with "Master and Commander" and concluding with "Blue at the Mizzen." It is renowned for its detailed depiction of life at sea, historical accuracy, and rich character development, making it a favorite among fans of maritime literature.