Seventeenth Edition. 83 pages. Red cloth backed paperback. Pages remain clear with minimal tanning and foxing. Binding cracked in half at pages 16-17, 32-33. Crayon note at page 17.Some occasional mild cracking to gutters throughout, binding remains reasonably firm. Cloth cover has mild edge-wear with light rubbing and creasing. Some light marking and tanning. Some loose threads. Ink text to front cover.