By Robert J. Groden and Harrison Edward Livingstone. "...I presume." Groden co-authored JFK: The Case for Conspiracy; this one insists the fatal shot came from the grassy knoll, that autopsy photos were forged, etc. -- although much of the photographic proof the back cover touts isn't probative to my eye.
The paperback isn't in super shape: there's a spine crack and a couple of corner folds; edgewear; page toning; mottling on the back cover; and evidence of a previous owner's coffee spillage. But it'll get the job done at the price.