I can also recommend "STUKA PILOT" by Hans Ulrich Rudel and "Erinnerungen eines Soldaten" by Heinz Guderian. I think i read in english both of the books few years ago. Rudel was a German pilot who has pro-Hitler and and supported his ideas and Guderian belonged to German military elite who didn't like Hitler at all. Of course every memoirs should be taken with grain of salt, but those books give interesting insight on the war from the otehr side.