The memoirs of Admiral Karl Dnitz, Ten Years and Twenty Days, are a fascinating first-hand account of the Battle of the Atlantic as seen from the headquarters of the U-boat fleet. Now, for the first time noted naval historian Jak P. Mallmann Showell has combined Dnitzs memoirs in a parallel text with the British Admiraltys secret Monthly Anti-Submarine Reports to produce a unique view of the U-boat war as it was perceived at the time by both...