Few of the massive military structures built by Germany during World War II are as impressive as the U-Boat bases and bunkers in Germany, Norway and France. This title takes a close look at the formidable edifices on the French coast (Brest, Lorient, St Nazaire, La Pallice, Bordeaux) in Norway (Bergen, Trondheim) and Germany (Keil, Hamburg, Helgoland) and also focuses on the huge 'Valentin' factory complex at Bremen, which manufactured the new type XXI electro-boats. Bunker protective systems, such as camouflage, light and heavy flak installations and nearby air cover, are also examined as well as resident flotillas and the fate of the bases at war's end.

Gordon Williamson is a retired civil servant who spent several years working for the Royal Military Police (TA). He has written over 60 military books, including a number of titles for Osprey: ELI 183 U-boat Tactics in World War II, MAA 434 World War II German Police Units etc. Amongst his primary interests are the German Navy in World War II, U-Boats, and the Military Police forces of the Allied and Axis armies. He lives near Edinburgh in Scotland.