His Lovely Wife by Elizabeth Dewberry

Tall, blond, and beautiful Ellen Baxter is mistaken for Princess Diana by the paparazzi just days before Diana's fatal car crash, and when her Nobel-laureate husband attends a physics conference, she visits the site of the accident, only to find an uncharacteristic photograph of Diana that leads her to the man who shot the photo and on a journey of self-exploration. 35,000 first printing.