Mars, Alastair Campbell Gillespie. Submarines at War, 1939-1945. London: Kimber; Annapolis: NIP; London: Corgi, 1971, 1974, 272 pp. Alt. title: British Submarines at War; foreword J.C.Y. Roxburgh. Mars, Alastair Campbell Gillespie. Unbroken: The Story of a Submarine. London: Muller; London: Corgi; Barnsley: Pen & Sword, 1953, 1975, 2006, 224 pp. Personal narrative, submarine, RN.