Rem,
I've collected over 150 books on The Battle of the Atlantic, Kriegsmarine and u-boat warfare. I mostly buy Hardcover First Editions if possible although some of my earlier purchases were paperback.
U-Boat Operations of the Second World War was released in Hardcover and Paperback. It's a two volume set which lists u-boats in numerical order. I've never bought it because I've considered this set to be too dry for entertaining reading. I'd rate this right up there with Jurgen Rohwer's
Axis Subamarine Successes of WWII which I bought and quickly sold. A great book for research but not for bed-time reading.
As mentioned above, Clay Blair's
Hitlers U-boat War: The Hunters and
Hitler's U-boat War: The Hunted are probably some of the best historical accounts of the Battle of the Atlantic, etc. The best account of May 1944 - May 1945 is Tarrant's
The Last Year of the Kriegsmarine. These three books are still a little bit on the dry side but are at least written in a naritive form.
A few recommendations:
Herbert Werner's Iron Coffins
Micahel Gannon's Operation Drumbeat
Daniel Gallery's Twenty Million Tons Under the Sea or U-505 (an early paperback edition)
Peter Cremer's U-boat Commander
Karl Donitz Memoirs
Note: my wife is selling my
paperback copies of Blair's
Hitler's U-boat War: The Hunters and
Hitler's U-boat War: The Hunted on eBay. They're each $13 plus S & H.