By Robert Sam Anson. "The Search For The Murderers Of John F. Kennedy." "What this book sees to do, on the basis of the evidence available now [i.e., as of publication in 1975] is to establish: that there was a conspiracy" including "links to the intelligence community," an Oswald lookalike, etc. Anson, an underrated genre reporter, may have tipped into crackpottery with this book...
...but you're not a crackpot for wanting to read this vintage PB. It's printed somewhat offline and has a cracked spine and toned pages, plus a sticker on the back, but it sits straight, and the pages are fairly tight and clean, no dog-ears. A fine reading copy.