1960. Fourth Edition. 256 pages. Illustrated dust jacket over blue cloth boards with lettering. Contains black and white illustrations. 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. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning. Clipped jacket has light edge-wear with minor tears and chipping. Mild rubbing and marking.