By Edward Jay Epstein. The first in what became Epstein's Assassination Chronicles trilogy, with an intro by Richard H. Rovere and blurbed by Dick Goodwin. Epstein was on the leading edge of published conspiracy thinking around the murder of JFK; the book came out in 1966.
So did this trim little paperback, which is in decent shape: a cracked spine with a very slight lean, some writing and stamps in the inside of the front cover/flyleaf, a few spots to the page edges. Otherwise, a fine reading copy.