Although there have been a great many books about the Battle of the Atlantic during the Second World War and the German U-Boat arm, the issues of tactics and doctrine have tended to fall in the cracks, even in such seminal studies as Clay Blair's Hitler's U-Boat War. Thus, Gordon Williamson's short study on U-Boat tactics helps to fill a useful niche in the historiography of the Battle of the Atlantic. There's nothing terribly new or original in this volume, but is fairly well organized and presented, as well as complimented by Osprey's trademark artwork. Overall, a good companion volume.
The first three sections in this volume cover night surface attacks on convoys, deck-gun attacks, solo missions (U-47 in Scapa Flow, the Mediterranean, North American waters in 1942 and the Far East in 1943-44) and wolf pack attacks. Five colorful graphics are included in this section to explain optimal U-Boat approach methods, convoy formations, patrol lines and wolf pack attacks. A brief section then covers U-Boat cooperation with the Luftwaffe, limited as it was. The next three sections cover associated equipment, offensive and defensive equipment, including decoys. A final section covers U-Boat defensive tactics against warships and against aircraft (the final section was quite interesting and supported by more graphics). The B/W photos throughout this volume are excellent, serving both to complement the text and interesting in their own right.
This volume is not really intended to draw any broad conclusions about the U-Boat offensive, not does it really attempt to ask/answer specific questions. Instead, it helps to add context to issues that are often subordinate to telling the story of specific convoy operations. Nor is there any real effort to aggregate U-Boat actions using statistics on tonnage sunk or effectiveness, although the author makes some good points about torpedo effectiveness (the best skippers scored about 40 percent hits and mostly with surface attacks) and the fact that many U-Boats never scored a single hit. Overall, a nice contribution to the record on U-Boats.