A fun book for children to learn the basics of arithmetic. - Title: The Amazing Arithmetic Encyclopedia - Target age: Children - Contents: Basic arithmetic knowledge and problem sets - Publisher: Yamato Shobo - Price: 3900 yen Thank you for viewing. I found this while organizing my room. It's quite old, but I haven't used it much. It has a cover and is in relatively good condition. The included puzzle is unused and still attached (please see photo 3). There are no folds, stains, or writing on the inside pages. Please understand that this is a used item before purchasing.