If you like Bonhoffer, you'd like "Every Man Dies Alone" by Hans Fallada. It's about a working class couple resisting the Nazis in Berlin during the war. I liked it a lot.
The first English translation only came out in 2009, so it may not have percolated down to the used book stores yet. (I checked it out of the library.)
Thank You for the tip! I will see if i can find it!
(Don’t you just LOVE FRee Republic!)