VGC. Sphere, 2020. First paperback editon-15th printing of this new edition (15). Small format paperback (small nicks and creases on the edges of the cover and spine) in VGC. Illustrated with b/w photos, map. Nice and clean pages with small ink marks and slightly yellow on the outer edges, small nicks and creases on the edges of the pages, slightly yellow on the edges of the first page of the book. 388pp including Foreword, bibliography and sources.