Thank you for viewing. "Penguin and Koharu's Troublesome Spot the Difference" Penguin Airplane Factory Price: ¥1100 "Let's Play Riddles" Seimido Publishing Price: ¥630 The riddle book has a tear in the cover. See photos. The spot-the-difference book has some creasing on the top of the cover, but the inside is clean. There are no writings or markings. Please understand that these are items inspected by an amateur and are used children's books before purchasing. Thank you very much.