Yes i highly suggest the reading of Cremer history during WW2
I have this book:
When you read all the patrols he managed to survive...that’s really incredible!
He often collide with enemies, not to say the planes bombs U333 survived...one was stuck on the deck and didn’t explode!
He was French (born in Alsace) but with German nationality too, and at war start he decided to join the Kriegsmarine...he survived the war...