On my days off this past week I read "U-Boat War" by Lothar-Gunther
Buchheim. He is the author of "Das Boot"on which the movie of the same name was based, and this book is more his actual wartime experiences coupled with lots of photos that he took during his time on U-96, as well as before and afterwards. Very personal and very compelling. The photos he took are simply captivating to look at as you read his words of events going on and captured on film. Great stuff for anyone interested in subs, the Battle of the Atlantic, or the film.