Why the Baltic was not a quiet theatre

Was there much fighting in the Baltic during the Second World War?

Yes. The Baltic saw extensive fighting, and Soviet naval history offers a route into the subject, although no specific book is named at this moment.

The Baltic saw extensive fighting during the Second World War. Histories of the Soviet Navy offer one route into the subject. No specific book is named because the intended recommendation could not be retrieved at that moment, so the exchange supplies a research direction rather than a campaign survey. The Baltic should not disappear from a map of wartime naval operations.