20th Edition. 272 pages. No dust jacket. Blue cloth. Slight cracking to hinges, with exposed netting, pages are loose. Pages have light tanning and foxing throughout. Heavier to first and last few pages. Minor dog-eared corners. Front free endpaper cut out. Boards have moderate shelf-wear with bumping to corners and rubbing to surfaces. Heavy sunning to spine and edges with crushing to spine ends. Tears to cloth to spine. Staining overall.