Dawn must have been an amazing woman, and probably she should be regarded as one of the trans pioneers. The book was titled as follows: "Man into Woman: A Transsexual Autobiography: The utterly frank, heart-touching story of a Transsexual's fight to claim her Womanhood".
This is what we can read about her on Wikipedia: "Dawn Langley Pepita Simmons (1922–2000) was a prolific English author and biographer. Born as Gordon Langley Hall, Simmons lived her first decades as a male. As a young adult, she became close to British actress Dame Margaret Rutherford, whom she considered an adoptive mother, and who was the subject of a biography Simmons wrote in later years."