Churchill sanctioned it, Montgomery organised it, Eisenhower washed his hands of it, and Stalin knew nothing about it. Following an innocuous telephone call from a member of his writing-circle, Barry Walker, military writer and historian, stumbles upon one of the greatest untold secrets of the Second World War. Locked away in the Ministry of Defence vault is a file marked: Operation Marigold - Top Secret - For the Prime Minister's eyes only. With...