Summer 1939. War is coming. The British believe that, through ingenuity and scientific prowess, they alone have a war-winning weapon- radar. They are wrong. War is coming, and it is to be a different kind of war. It will be fought, as expected, on land and sea and in the air. It will also be fought on the airwaves. It will be fought between scientists on both sides at the forefront of knowledge, and the agents and commandos they relied on to bolster that knowledge. Luckily there was one young engineer, Reginald Jones, helping the British government with their own scientific developments. Relying on first-hand accounts from Reginald Jones as well as papers recently released by the Admiralty, this fills a huge missing piece in the canon of WW2 literature.