Thank you for viewing. A popular picture book series, "Oshiri Tantei" (Butt Detective), a fun story for preschoolers to elementary school students. - Title: Oshiri Tantei (Butt Detective) - Series Name: Oshiri Tantei (Butt Detective) - Author: Troll - Language: Japanese - Target Age: Preschoolers and Elementary School Students - Oshiri Dandy the Young: Dinosaur Island The cover of "Curry Incident" is missing and has some scratches, but the inside is clean. The other three books also have scratches on the covers. Please understand that these are used items.