1965. Fourth Edition. 185 pages. Pictorial dust jacket over blue cloth with gilt lettering. Black and white illustrations throughout. Minor tanning to pages. Slightly more prominent to text block edges, pastedowns and free endpapers. Light creasing to gutters but binding remains firm. Boards have minor corner bumping and edgewear with mild sunning and scuffing overall. Spine has similar sunning with soft crushing to ends. Lettering remains bright and clear. Book has a slight forward lean. Clipped dust jacket with minor rubbing, chipping and tearing to edges. Moderate tanning and scuffing overall.