Women in intelligence : the hidden history of two world wars /Helen Fry.

"At the outbreak of the First World War, women began to take on an extraordinary range of roles in intelligence, from knitting coded messages into jumpers to running entire spy networks. By the Second World War women were also working as double agents, parachuting behind enemy lines, and even interrogating prisoners. Back in Bletchley and Whitehall, their vital administrative work in MI offices kept the British war engine running. All the while, these women were sworn to secrecy - even Churchill didn't know that is own daughter Sarah was working for Operation Torch. In this major, panoramic history, Helen Fry showcases the inspirational contributions of these remarkable women. Drawing on recently declassified material and personal testimony, Fry places new research on record for the first time and reveals the vital aspect missing from other histories."--