I like the notion of a novel take on this topic. I'd be curious to know when it's set, and how ahistorical it might be. My suspicion is that the emphasis on storytelling will mean that they'll use a lot of dramatic license.
One of the things I found most interesting about the Battle for the Atlantic was the whole variety of factors that came into play, in terms of both technology and doctrine. The interaction between air coverage for convoys, surface ship anti-sub weaponry, escort pursuit doctrine, signals intelligence and cryptoanalysis, air patrols over sortie areas for U-boats, hunting of U-boat sub tenders, introduction of various different radar types in airborne and surface-ship assets, and even shoreline regulation is fascinating. Even questions as simple as "Should bombers set their depth charges to land 20 feet apart, 50 feet apart, or 100 feet apart?" ended up having major ramifications in the grinding war of attrition that was the war in the Atlantic.
For a great pair of books on the topic, I heartily recommend either Operation Drumbeat or Black May, both by Michael Gannon.