I got mine from Ostara Publications. They're a legit site, I highly recommend. They even replaced for free some books of mine I bought from them that were (((lost in shipping))); from their website it sounds like that's a common problem they have. Gee, I wonder why.
My German isn't native but, muchlike Hemmingworth, Hitler he was a big proponent on using very simple words to convey ideas, so even a B2 can understand most of it. I've also lived in the places his materials are banned (mostly Austria). The youth there are surprisingly not anti-Hitler. They're either secretly pro-Hitler, or uncaring. Because they've read the originals and listened to some of his speeches, they know he isn't evil. Which is why the hammer is brought down so hard on them especially. Unfortunately, Germans and Austrians (Austrians especially) have such good lives, compared to the average American, they won't bother struggling for a long, long time. Hard to care about much in such beautiful places, until a Hajji wakes you from your dream.
I think I've got the gyst of it