DesertGhost,
If you have a Kindle or the free Kindler reader on your PC there is a free book,
The Diary Of A U-Boat Commander, you can download from Amazon:
http://www.amazon.com/Commander-Intr...boat+commander
It is the war time diary of a U-Boat commander during WWI. I have not had a chance to read it yet, but being free it would probably be worth a look.
Kelly621