The cover and the text are clean, with no writing or markings, and there's not much evidence of it having been read, so you can use it with satisfaction. [Complete Set] This "Encyclopedia for Children," consisting of all 18 + 2 volumes, is packed with content that stimulates children's curiosity. [Abundant Illustrations] Each volume contains a wealth of easy-to-understand illustrations and diagrams, allowing children to learn while having fun. [Learn in Japanese] Written in Japanese, it's perfect for children to deepen their knowledge in their native language. - Title: Encyclopedia for Children - Volumes: All 18 + 2 volumes - Language: Japanese - Cover Color: Yellow - Contents: Children's books with abundant illustrations and diagrams Thank you for viewing.