1957. 4th Edition. 53 pages. No dust jacket. Signed by the author. Paper covered boards. Signed by the author with dedication to title page. 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. Tear at top of plate at page 18. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning.