1969. Seventh Edition. 158 pages. Paperback book with red cover. Pages are bright and clear with no visible markings. Binding throughout remains firm. Pencil inscription to first page. Mild droplet staining to text block edges. Paper cover has mild edge wear with mild corner curling. Mild scratching and marking to boards. Mild water droplets to front cover. Books has a backward lean. Covers are mildly warped.