Wow, that takes me back! I read that when I was a kid in highschool. The book belonged to my dad (wonder if he still has it?). I didn't know someone had turned it into a film. It inspired me to write a similar story for the book, "Echoes: An Anthology of Warbirds Fiction" (published back when I was flying Warbirds, and before AH). It tells the story of a German pilot during the battle for France, in the form of diary entries written to the pilot's son. I posted the fictional diary entries during a multi-day scenario of the Battle of France, one entry each day. They were actually accounts of my own missions during the scenario, but I posted them without any explanation. The best compliment I ever got was when someone posted a comment in the thread, which read, "Wow, it's really amazing to read an actual account of the battle. What ever happened to this pilot?"