Enigma and Its Achilles Heel [Signed]

Pinner, Middlesex: Hugh Skillen, 1992. Very Good/Very Good. Pinner, Middlesex: Hugh Skillen, 1992. First Edition. Octavo; publisher's boards in white photo-illustrated dust jacket; [8],225pp.; illus. Moderate wear and soil to jacket and boards, corners nudged; Very Good and sound overall. Signed by the author on title page.