No Edition Remarks. Unpaginated. Illustrated paper covers. Colour illustrations throughout; some are animated pulleys. Light thumb marking, foxing and tanning to pages. More prominent to text block edges, title pages and reverse of covers. Light cracking and staining to gutters and hinges but binding remains firm. Paper covers have light edge-wear and corner curling with mild tanning and scuffing overall. Spine has heavier chipping, rolling and creasing.