The Aubrey–Maturin Series is a collection of historical novels written by author Patrick O'Brian. Set during the early 19th century, the series follows the adventures of Captain Jack Aubrey of the British Royal Navy and his close friend, Stephen Maturin, a ship's doctor and intelligence agent. The books explore themes of friendship, naval warfare, and the complexities of life at sea. Spanning 20 novels, the series begins with "Master and Commander" and concludes with "Blue at the Mizzen." The richly detailed narratives are known for their accurate portrayal of naval history and the intricacies of maritime life, making them popular among both history enthusiasts and fiction readers.