NSDAP books

[Schachbrett]

Hi everybody!
I came recently into possesion of these two books and I'm willing to trade them. First one is publicated by NSDAP, and second by Schlieffen, Berlin. In red one I found letter which I'll post later.
Does anyone knows what's the worth of these books??? Thanks!

[Schachbrett]

Second book, publicated by Schlieffen, Berlin.

[Schachbrett]

Actually 2 letters. I won't publish contents. First is for a doctor in a hospital. It's from a lady. The other one I can't figure out.