Codename Valkyrie
General Friedrich Olbricht and the Plot Against Hitler
Kill the Fuhrer! A secret plot three years in the making. The main conspirator: one of Hitler's most trusted and decorated generals. His plan would have changed the course of history -- if Colonel Stauffenberg had not failed.
The true story of the mastermind behind the plot to depose Hitler and re-establish the rule of law in Germany: Friedrich Olbricht.
Helena Schrader’s incisive account describes the transformation of a highly decorated senior German Army officer into an active conspirator dedicated to removing Hitler from power. She convincingly shows how Olbricht’s plans might just have succeeded, had Stauffenberg not failed to kill the Fuehrer on 20 July 1944.
Other non-fiction sources about the German Resistance to Hitler recommended by Helena P. Schrader: