This is volume 2 and 3 of a series of spot-the-difference books featuring a penguin character, aimed at children. - Series Name: Spot-the-Difference - Volume: 2 - Volume: 3 - Character: Penguin - Target Age: Children - Language: Japanese Thank you for looking. While I believe the books are in good condition, there's a possibility of some writing on 2-3 pages, possibly done with the included blacklight pen (the pen is not included). This is the price for the set. Please understand that these books have been handled by a child. No claims or returns accepted. "Penta and Koharu's Troublesome Spot-the-Difference" Penguin Airplane Factory Price: ¥1100 I have other picture books for sale. I offer combined sales, so please comment if interested. #PenguinAirplaneFactory #Books #Nature/Biology #Spotthedifference #Children'sBooks #PictureBooks #Penta #Koharu #SpotTheDifference #BrainTraining #CombinedSales