1961. Fifteenth Impression. 640 pages. Blue dust jacket over red cloth. Clean pages with mild foxing throughout. Tightly bound with faint thumb-marking throughout. Boards have light edge wear with minor corner bumping. Mild crushing to spine, with occasional markings overall. Book has forward lean. Boards are mildly warped. Clipped jacket has moderate edgewear with chips, tears, and creasing. Heavy foxing. Moderate tanning to spine. Light rubbing and marking all over.