1968. First Sphere Books Edition. 864 pages. Illustrated paperback. Slight pulling to front cover, remains firm. Pages and binding are presentable with no major defects. Minor issues present such as mild cracking, inscriptions, inserts, light foxing, tanning and thumb marking. Overall a good condition item. Covers have mild edge-wear with curling to corners. Visible tanning to spine and edges with scuffing to spine ends.