Every school-child is taught that Hitler thought long and hard about invading Britain - but got cold feet at the last minute. But just how close did he get? What is the truth in rumours that Nazis did land in East Anglia during the war? Danny Wallace has been pounding the fields of Suffolk and Norfolk in a search for signs of Britain's lost invaders. On the way he uncovers evidence of secret experiments by our own armed forces, experiments which only fuelled and what was the truth about the mysterious red barns which sprang up across the farmlands of East Anglia at the height of the war? Who built them and why? Were they the real evidence of detailed German preparations for the conquest of Britain?