I spent 2 hours at the bookstore reading through Patricia Cornwall's Portrait of a Killer: Jack the Ripper--Case Closed. She convinced me-artist Walter Sickert was Jack the Ripper. I thought the book was fascinating and wanted to check it out after I saw Cornwall on tv being interviewed about her investigation. I just checked the Amazon link so I could put it here, and all the reviews were horrible! I thought the book was very interesting and the evidence, although circumstantial, very convincing.