_'What would it be like to keep a secret for fifty years? Never telling your parents, your children, or even your husband?'_ _Codebreaker Girls: A Secret Life at Bletchley Park_ tells the true story of Daisy Lawrence. Following extensive research, the author uses snippets of information, unpublished photographs and her own recollections to describe scenes from her mother's poor, but happy, upbringing in London, and the disruptions caused by the outbreak of the Second World War to a young woman in the prime of her life. The author asks why, and how, Daisy was chosen to work at the Government war station, as well as the clandestine operation she experienced with others, deep in the British countryside, during a time when the effects of the war were felt by everyone. In addition, the author examines her mother's personal emotions and relationships as she searches for her young fiancee, who was missing in action overseas. The three years at Bletchley Park were Daisy's university, but having closed the door in 1945 on her hidden role of national importance - dealing with Germany, Italy and Japan - this significant period in her life was camouflaged for decades in the filing cabinet of her mind. Now her story comes alive with descriptions, original letters, documents, newspaper cuttings and unique photographs, together with a rare and powerful account of what happened to her after the war.