1967. Second Edition; Second Impr.. 63 pages. Grey dust jacket over blue cloth. Pages remain bright and clear with minimal tanning and foxing. Pencil inscription to front free endpaper. Light creasing to gutter. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Minor crushing to spine ends. Minimal marks to boards. Unclipped jacket has light edgewear with tears and creasing. Some tanning to spine. Minor rubbing to surfaces.