This is a set of two official textbooks published by the Japan Interior Industry Association. These textbooks are useful for studying interior design, preparing for certifications, and acquiring industry knowledge. ・Publisher: Japan Interior Industry Association ・Price: 4,300 yen + tax each ・Number of books: Set of 2 (Orange / Blue) There are scratches and minor marks on the covers (see photos). There are no major writings inside, but some lines have been drawn with a marker. Please understand that there may be oversights. Please purchase only if you understand that these are used books stored at home.