1967. First Sphere Books Edition. 190 pages. Black paperback. Pages are moderately tanned and foxed throughout. Thumb-marking present. Previous owner's inscription to reverse of front cover. Some yellow staining to pages throughout. Pulling to covers. Binding remains firm. Paper covers have moderate edge-wear with curling to corners and rubbing to surfaces. Light tanning to spine and edges. Some marks and scratches to covers. Reading creases to spine.