Sub Tactics and strategy

[Delareon]

Thanks Hitman but the modern warfare is more interesting for me.

I know for the WWII era you can get tons of information, but im more interested in
the modern sub tactics and strategys.

Some type of Sonar description would be also interesting.
But i dont know if that is the right type of book for me.
I have readen a book about Submarine construction and it was too much theory for me.