1987. Fourth Edition. 246 pages. No dust jacket. Green cloth with gilt lettering to front board and spine. Pages are bright and clear, with light tanning to text block edges. Former owner's inscription to front free endpaper, with water marks, rubbing and a few small nicks along text block edge. Occasional thumb-marking present throughout. Boards have moderate shelf-wear with notable bumping to corners and rubbing to surfaces. Light sunning to spine and edges, with visible crushing to spine ends. Boards are noticeably bowed. Small split to spine end, with water marks to upper edges.