Alain:
That's one I have not even seen...probably because it is in your preferred tongue. I like to say I was never much good at learning any language other than English. My cover was all the language classes I had to take. When I was in high school in Massachusetts Latin and French were mandatory and, in college, I took Spanish and Hebrew. Thus, my failure to take much away from these classes, beyond the testing in the classes themselves, I blamed on lack of aptitude. Now older, and at a stage in life when I find ego more amusing than serious, I know I was just plain lazy when it came to languages
Pardon that lengthy aside. I've read most of the Luftwaffe memoirs that appeared in English. The standards are The First and the Last, by Galland (I read that as a teenager when everyone else was reading The Lord of the Rings), Stuka Pilot (I'm blanking on the author...mostly because, unlike the others, that guy was a real Nazi), I Fought You From the Skies (Willy Heilman), Messerschmitts Over Sicily (Steinhoff), along with biographies such as The Blond Knight of Germany (Bubbi Hartmann, the highest scoring combat pilot in history), and a bunch of others.
The ones that gave that objective, dark picture you mention were Galland's and Steinhoff's. Messerschmitts Over Sicily is the best from a day-to-day pilot's perspective. Galland's, as he rose to the highest ranks of the Luftwaffe, gives great insight into the appalling flaws in German leadership.
Given the Jewish half of my heritage, and the fact that these guys were the enemy after all, I was reluctant to view them with objectivity at first. Yet most of these men, by German tradition, had no interest in politics and no involvement in those most hideous, sociopathic acts of utter horror that we rightly associate with the National Socialist government of the day. Soldiers don't choose the wars they fight. Those, however, who engaged in killing apart from any moral measure, even in war, I hope are vomiting wasps in hell for eternity.
Back to pure aviation, the aircraft that has always had the most appeal to me was the Messerschmitt 109. I finally got to sit in the one at RAF Hendon in the mid 90s. This was during a comprehensive photo shoot of German WWII aircraft cockpits I was engaged in for the online game I was producing back then. Our customers were not classic computer gamers. They were much older and demanded aircraft authenticity.
It frightened me as I learned just how advanced for their day many German aircraft were. Not the 109 though. It's appeal, for me, had nothing to do with technology or the war. There's something about that airplane that gets to me in a manner I cannot explain. I'm sure everyone reading this has a favorite military aircraft that has an inexplicable, deep draw for them.
But the best books have little to do with machines and everything to do with men.
Jonathan