_ 'Tantalising' Sunday Times 'Thoroughly enjoyable' Guardian 'Irresistibly charged' Mail on Sunday _ No one looks twice at the women in the typing pool. No one knows that two of them are trading secrets. The secret is a book, the size of the one in your hands, and within its pages, a love story that could change the world. But where there is love there is pain. And where there is deception, formidable danger... _ 'Mixing Mad Men and John le Carre ... addictive' i paper 'Utterly compelling... I absolutely loved it' Sarah Winman