1966. 4th Edition. 139 pages. Red and cream dust jacket over red cloth. Binding remains firm. Pages have light tanning and foxing throughout. Front free endpaper cut out. Water staining to some page edges, text remains unaffected. Boards have light shelf-wear with corner bumping. Slight crushing to spine ends. Clipped jacket has moderate edgewear with chips, tears, and creasing. Light tanning to spine and edges. Water staining to spine. Foxing overall.