Patrick O'Brian, CBE (12 December 1914 – 2 January 2000; born as Richar Patrick Russ) was an English novelist and translator, best known for his Aubrey–Maturin series of novels set in the Royal Navy during the Napoleonic Wars and centered on the friendship of English Naval Captain Jack Aubrey and the Irish–Catalan physician Stephen Maturin. The 20-novel series is known for its well-researched and highly detailed portrayal of early 19th century life, as well as its authentic and evocative language. A partially-finished twenty-first novel in the series was published posthumously containing facing pages of handwriting and typescript.