The Black Orchestra Boxset 2

Three spy storiesThe Gingerbread Spy (book 4 in The Black Orchestra series)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.
The Black Orchestra: Endgame (book 5 in the series)It is 1944. Kurt Müller is sent on a mission to support a Resistance cell in Northern Germany. While the vast Soviet Red Army is advancing from the East and the Western Allies are preparing to invade France, Heinrich Himmler, head of the dreaded SS, is conspiring to take over from Adolf Hitler. But  he's not the only one. After D-Day, the Nazis use their V1 flying bombs and V2 rockets to terrorize London, and the Black Orchestra's plan to remove Hitler is finally realised.
Kurt and his Resistance cell play a vital role in the assassination attempt. But when they carry out a critical act of sabotage, Kurt is captured by the Gestapo. Can he talk his way out of danger yet again and escape to freedom?Spy One (a novella)May 1940. Eight months after the start of WW2, Britain under Neville Chamberlain's leadership, failed to prevent the Nazis' invasion of neutral Norway. When Winston Churchill took over as PM he was confronted by a spy peddling a scandal that could split the War Cabinet.
And when the British Expeditionary Force was cut off and surrounded at Dunkirk, Churchill had to summon every resource at his disposal to hold his fragile coalition together and to salvage the British Army.