Since the historian John Keegan is mentioned quite often in the WWII show, I thought that it would be suitable to give him more credit in the form of a possible biopic special. Who was he and why is he so influential as a military historian? let’s have some metaperspective.
Not the official answer, but I read his history of military intelligence and the American Civil War. The guy is a born teacher, he takes big picture things like geography, economic lynchpins basic logistics and makes it very accessible in an interdisciplinary confluence so you can see how all the factors worked together. He’s breezily readable and his conclusions are almost always nuanced, fair, and insightful. I especially recommend his work on military intelligence, which definitely brings Betchley Park down a peg from superpower to really useful ace in the hole: