Edited by Peter Dale Scott, Paul L. Hoch and Russell Stetler. "A Guide to Cover-Ups and Investigations." A "carefully selected anthology" that "brings together, for the first time, the best of" the critics of various assassination investigations of the 20th century.
A 1976 PB first that looks its age -- toning to cover and inside, some smudging to page edges and some mild edgewear to the covers, plus that bright green sticker on the front. But it sits quite straight, little spread, no dog-ears or writing that I could see. A solid addition to your research shelf.