1958. Fourth Impression. 270 pages. No dust jacket. Blue cloth. Contains black and white diagrams throughout. Pages are moderately tanned, but text and diagrams remain clear. Binding is firm. Slight cracking to front hinge. A few small marks to textblock edges. Boards have heavy shelf-wear, with visible corner bumping and noticeable scuffing to edges. Spine and edges are heavily sunned, with light crushing to ends. Small water and ink stain to front board. Faint black marks overall, with small red ones to rear board. Slight forward lean.