1963. Fourth edition. 300 pages. Pictorial dust jacket over blue cloth. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Some marginalia and underlining. A previous owner's name to front free endpaper. Boards have mild shelf wear with light rubbing and corner bumping. Some mild marking and tanning. Unclipped jacket has light edge wear with minor tears, chipping and creasing. Some tanning and foxing to all surfaces, particularly to spine.