1970. Fourth edition, third impression. 155 pages. Pictorial dust jacket over grey cloth. Presentation plate on front free endpaper. Black and white illustrations throughout. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Boards have light shelf wear with minor corner bumping and crushing to spine ends. Clipped jacket has light edge wear with minor tears, chipping and creasing. Some rubbing and marking to surfaces.