By Donald Rumbelow. Introduction by Colin Wilson. Rumbelow is retired London police and a crime historian, specifically a Whitechapel-murders expert. This paperback promises "new evidence -- plus postmortem photos of the Ripper's victims." Not sure about the former; can confirm the latter.
Can also confirm the PB is in acceptable but not great shape: some edgewear and page toning/foxing; cracked spine with a lean; spotting to page edges. But for this price, it’ll work as a research copy that you can recycle after.