Fictional books: "A Farewell to Arms" by Ernest Hemingway, "Slaughterhouse Five" by Kurt Vonnegut, "Catch-22" by Joseph Heller
Nonfictional books: "Blitzkrieg: From the Rise of Hitler to the Fall of Dunkirk" by Len Deighton, "Hitler's War Machine" by Robert Cecil
The German air-force was known as the Luftwaffe and played a critical part in Germany's strategy.