U-48: The Most Successful U-Boat of the Second World War: Franz Kurowski: 9781848326064: Amazon.com: Books
Amazon.com: U-boat
U-Boat 1936-45 (Type VIIA, B, C and Type VIIC/41): An insight into the design, construction and operation of the most feared German U-boat of World War 2 (Owners' Workshop Manual): Gallop, Alan: