Hi Maxwell,
Welcome to the forums! Hope you find what you are looking for here and I am sure you will enjoy discussing submarine warfare here. We have got some members who are well-read on the subject.
I myself have read Jost Metzler's
The Laughing Cow. You can find my book review of the book on
www.uboat.net Although it is a very interesting book by one of the U boat commanders (U61), and one of the first to appear in print, I believe, I feel it lacks in detail. Nonetheless, if you can find it, read it! Great book on the war from the pov of a commander.
Iron Coffins by Herbert Werner is also an interesting account although apparently there are some factual mistakes in the book. I am not well read enough on the subject to tell you which ones they are, but I thought the book was a good read.
These are the only books I have read on the subject. I have Paul Kemp's
German U Boat losses in the World Wars, but that is a mere listing of all German U boats that were lost. Per U boat is stated the Where, Why, How, When, etc.
Hope this helps
Stevin