From Mata Hari through to Noor Inyat Khan, women spies have rarely received the recognition they deserve. They have often been trivialized and, in cinema and popular fiction, stereotyped as vamps or dupes. The reality is very different. As spies, women have played a critical role during wartime, receiving and passing on vital information, frequently at considerable risk. Often able to blend into their background more easily than their male counterparts,...