I don't know why some people calls this book a "gem", unless their concept of the word emphasizes the more mineral aspects of Dr Bradham's very minor opus. Obviously I disagree with the five stars category given by some reviewers, but everybody can heap praise on those titles he/she likes, which it is not my case.
First of all as some other reviewers have pointed, the title is misleading: the coverage of the U Boat bases is quite reduced (those with a particular interest on the subject can find of interest the book of the same title in the Osprey "Fortress" series), even worse is the fact that there is almost no material about the layout or description of the fortresses which surrounded the ports used by the germans as U boot bases (again other titles can solve this gap: Rudi Rolf "Fortress Europa" or the Kaufmann books). The worst is the schematic description of the military operations around those "Festungen", the coverage of the french military units which took part is limited to some anecdotes, which tends to suggest that its participation was a minor affair, again this is untrue. The reader looking for coverage of the operations against the southern festungen (Grave-Royan, Oleron, Ile de Re, La Rochelle-La Pallice) is going to feel very disappointed, as was my case. Nothing is said of the Royan amphibious operation, which employed several thousands of troops mainly french units.
The book which is clearly amateurish, offers some interesting photos and sometimes valuable material, dispersed thru its pages. In my opinion however its worst flaws are the lack of a coherent structure which makes it difficult to read and boring and a title which is sadly misleading: it promises a lot but deliveres little. If the writer had chosen another title for his remembrance of world war two, perhaps it would have been less disappointing.