The German Book Office New York issues lists of German non-fiction books whose rights can be bought for translation into English (it has fiction lists too). Here’s a link to Spring 2009 (PDF).
The Folks in Germany in the Empire and the Weimar Republic.
Folk groups, which had an ideology that was based on racist nationalist…Stefan Breuer, expert in the area of radical flows of the 19th and 20th century…
Völkisch movement (Wikipedia)
I also had my doubts about the Children’s Oddesy – on the run from the Third Reich in the promised land (by Jutta Vogel).
Mind you, this is a context where perfect translation doesn’t matter too much.