1960. Third Edition. 132 pages. No dust jacket. Blue illustrated cloth covered boards. Pages remain clear with minimal tanning and foxing. End papers are more notably tanned. Minor pencil marking to front free end-paper. Cracking to hinges, no damage to end papers. Some occasional mild cracking to gutters throughout, binding remains reasonably firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Mild crushing to spine ends. Moderate tanning to spine. Boards have minor damp and dust stains. Book has a slight forward lean.