I have now finished "A Game of Birds and Wolves", I must say I am somewhat disappointed. It more of less finished in April 43 except for the what happened to the protagonists later. No account of WATUs activities for the remainder of the war in the Atlantic. As WATU was involved in developing tactics for use against German anti-escort (acoustic homing) torpedoes when these arrived later in 43 this is a significant omission.
I suppose this is a consequence of a world where journalists are attempting to write "a good story" disguised as history and see no point in continuing beyond where their point has been made, where they think things become uninteresting to their target audience or they become bored with the topic.
In retrospect I am also suspicious about the origin of the title. As the author is trying to show the contribution of (young) women to the war effort, there is a suspicion in my mind that the "Birds" of the title is the (outdated) slang term for young women (and the wolves maybe the U-Boats if not a male dominated RN of the time)
Of lesser concern is my suspicion that that the author is not that familiar with the game of "Battleships" seeming to think it any vaguely hobby (as opposed to professional) naval game.