Winning the Battle of the Atlantic was critical to Britain's survival in the Second World War. The British Merchant Navy suffered enormous losses of both ships and men, particularly in the early years of the war. Sailing through U-boat wolf-packs across the Atlantic, or on the perilous routes to Malta and Murmansk, took a special kind of courage. Ships often sank within minutes of being torpedoed. Survivors is the history of this epic struggle. It is a graphic account of how the ships were attacked and sunk, how crews reacted, how they attempted to launch their lifeboats and how they ended...