I have two variations of the first edition of "Thoughts on the Kentucky Rifle in its Golden Age"
1) About 2 1/2 inches thick, copyright 1960, signed Joe Kindig Jr.
2) About 1 3/4 inches thick, copyright 1960, first printing 1960, with a note from Jay Gaynor that George Shumway had inscribed it to Joe, and presented it to him, but Joe returned it with a notation "Alas, a defective copy" and did not sign his name. This is, I am guessing, an early second edition that had a few errors that needed to be corrected in later copies.