228 pp. "The story of the WWII German type VII U-Boat U-570. Captured by the Royal Navy and returned to service in the Royal Navy as HMS Graph." "HMS Graph (pennant number P715) was a German Type VIIC U-boat that the British Royal Navy captured during World War II. Commissioned as U-570 in Nazi Germany's Kriegsmarine in mid-1941, she was attacked and captured on her first patrol. She provided both the Royal Navy and United States Navy with significant information on German submarines, and carried out three combat patrols with a Royal Navy crew, becoming the only U-boat to see active service with both sides during the war. She was withdrawn from service in 1944 due to problems maintaining her. While being towed to the breakers for scrapping, she ran aground on an island off the west coast of Scotland. Some of the wreck was removed as scrap but some wreckage remains there to the present day."
