No Edition Remarks. Unpaginated. Illustrative paper covers with illustrative slipcase. 6 books in one slipcase. Dated from 1971 to 1972. Each paginated separately. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Pulling to covers. Binding remains firm. Paper covers have mild edge-wear with slight rubbing to surfaces. Light curling to corners. Some tanning to spine and edges. Slight scuffing to edges. Slipcase has moderate edgewear with marking to panels and scuffing to edges. Noticeable rubbing to surfaces. Some tearing to edges.