Thank you for viewing. As you can see in the images, the inside is clean, but there are some slight stains on the edges due to being stored by a non-professional. Please understand this before purchasing. ★Other Please refrain from purchasing if you are looking for the same condition as in a store, as this item has been stored and inspected by a non-professional. Also, I have noted any concerns, but please forgive any flaws I may have missed. Basically, no claims and no returns are accepted. Please make your judgment based on the images, and feel free to ask any questions. "Calculate Quickly" Nichinoken / Fujiko F. Fujio Pro Price: ¥760 #Nichinoken #FujikoFFujioPro #book #nature/mathematics