Hardcover. Condizione: Very Good+. Condizione sovraccoperta: Very Good. First Edition. Presents a collection of twenty-three papers and essays by Dr. Rockwell over a period of half a century. First edition, hardcover, top edge a bit dusty, corners very lightly bumped, otherwise tight and square, a VG+ copy in a VG dustjacket which is a bit edgeworn, has a few short closed tears, a crease to the front inside flap and some wear including tiny chips at the spine ends and corners.