I admit to having a great interest in the Jack the Ripper case and have for many years. I was interested to see what Cornwell could come up with as to who could have done the killing. I was thoroughly disappointed with this book. It was basically filled with Cornwell's guesses that she put out as facts. What really set me off was that part of the book where she was walking down the street with her editor (I think) and says, "I know who did it." From then on, I had a feeling I wasn't going to enjoy this book so much. I did try to keep an open mind, which is more than I can say for her. She fixated on Walter Seikert and never let go. She just made all these facts from his life just fall inter her theory. It was shoddy investigative work and an example of what not to do in an investigation. I wouldn't suggest anyone to read this book.