This is text for QQ Kids Smart Kids. The front and back covers show signs of use, scratches, and dirt. The inside is clean and has not been written in. (Sorry if I missed anything.) These two books are only sold as a set. - Series Name: Smart Kids - Volumes: 3, 4 - Content: English learning textbook - Illustrations: Colorful and child-friendly illustrations - Target age: For children QQ English Thank you for looking.