Frontline Books, 2nd ed., 2014. Xii + 305 pp., 32 photo-plates. D.j., 24 x 16cm. FINE. First published in 1998, this is a highly detailed account of German submarine losses during the Second World War. This second edition being fully up-dated, the result of 16 years of further research ' including dives on U-boat wrecks yielding new information and corrected wartime reports. The fates of 65 U-boats have either been fully determined or corrected from the first edition. The author describes various U-boat types and their building programmes, and then lists by hull number each U-boat's date of commissioning, its commanding officer, and the date and port of departure for its last patrol. It also gives the date, position and cause of loss for each submarine, with complete details on Allied units involved in the sinking, the names and ranks of their commanding officers and pilots, and the number of crew lost or rescued. An appendix summarizes valuable statistical data on German U-boat losses. There is extensive indexing of persons, ships and aircraft. Every U-boat contracted or impressed into the German Navy between 1935 and 1945 is covered.