From acclaimed military historian Gavin Mortimer comes a gripping SAS thriller inspired by the real clandestine operations conducted behind German lines after D-Day. Drawing on years of research into the history of Britain’s wartime special forces, Mortimer brings extraordinary authenticity to a story of courage, deception and betrayal.

June 1944. Occupied France.

As Allied forces storm the beaches of Normandy, a squadron of elite SAS soldiers parachutes into the forests of central France. Their mission is simple and deadly: wage a guerrilla war against German units racing north to crush the invasion. But the enemy is even closer than they think.

One of the SAS is a traitor — a man captured in North Africa in 1942, turned by the Germans, and now a committed Nazi. Embedded within the squadron, he is going to sell out his comrades. Operating alongside the local Maquis, the SAS ambush convoys, sabotage railways, and melt back into the woods. At first, losses are blamed on chance, on the brutal randomness of war. Then a soldier dies in unexplained circumstances. Another disappears without trace. Slowly, chillingly, the truth emerges: someone inside the unit is selling them out.

But who is the Judas? Is it the smooth-talking Pollock? The hard-bitten Dobbs? Allenby, the radio operator? Gaskell, the joker? Or one of the younger men? With German patrols closing in and trust collapsing from within, the SAS must uncover the traitor in their ranks — before he leads the enemy straight to them.

A tense, gripping wartime thriller of loyalty, betrayal, and survival behind enemy lines.