This is a problem book for 4th and 5th grade math. The 4th grade book is "High Class," and the 5th grade book is a standard problem book. The 4th grade book has some writing in it. I erased what I noticed, but there are still eraser marks and pencil marks. The condition is worse compared to the 5th grade book. The 5th grade book doesn't seem to have been used much, and I think it's in good condition. Please refrain from purchasing if you are looking for something in new condition. Please ask any questions in the comments before purchasing. Retail price: 4th grade: 1210 yen 5th grade: 1155 yen