By Jay Robert Nash. "The Definitive Book Of American Crime" in its more serialized/portable version; this one is the gangster volume. (I think? "Butch Cassidy To Al Capone" isn't real helpful.)
This PB looks its age, around 50: a cracked spine with some "spread"; edgewear; previous owner’s name on the flyleaf; page toning and a couple of nicked pages inside, and a couple of small splits to the top and bottom of the cover. But it's readable, and somewhat difficult to find.