Gingerbread Spy

A German secret agent threatens the D-Day landings.
February 1944. British Intelligence is using German double agents to deceive the German high command about Operation Overlord - the location chosen for the D-Day landings.
When they pick up an unauthorized transmission from near London, the whole deception plan is thrown into jeopardy.
And Kurt Müller is the main suspect.
To save Operation Overlord and clear his name, Kurt must find the rogue agent and silence him.