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 good shape: some edgewear and page toning, but the spine, while cracked, sits very straight. A good research copy.