A set of 4 books from the High School 2nd Year TH Mathematics Integrated Series. Textbooks ① and ② have no writing (please forgive any oversight), but show some signs of use, such as creases. ③ is new. The answer creation training materials in plastic wrap are all unopened. - Title: High School 2nd Year TH Mathematics Integrated - Series: High School 2nd Year TH Mathematics Integrated - Publisher: Kawaijuku - ISBN: 978-4-7669-8294-9 - Number of books: Set of 6 Thank you for looking.