This is the standard reference book from Suken Publishing, "Blue Chart Mathematics II+B." It is a very popular book, considered a bible for university entrance exam preparation. Chart Style: Basic Mathematics II+B (Blue Chart) Publisher: Suken Publishing (CHART INSTITUTE) Level: For mid-tier to difficult national and private university entrance exams. [Product Condition] • Writing: None • Signs of Use: There are some scuffs and corner creases, but the inside is very clean and does not interfere with learning. There is a faint stain on the back cover. Due to its thickness, it will be sent in simple packaging. Please understand that there may be scratches or creases during shipping. ✼••┈┈••✼••┈┈••✼••┈┈••✼••┈┈••✼ ✿Shipping Method Rakuraku Mercari便 ⇄ Yuu-yuu Mercari便 Shipping may be changed depending on the situation. Please understand this in advance. ✿For environmental protection (eco-friendly) reasons, we may reuse packing materials (cardboard boxes, cushioning materials, paper bags, etc.). We will pack carefully to protect the product, so we appreciate your understanding. ✿I have an irregular work schedule, so it may take time to respond to comments, but I will always reply, so please wait. ✿There are no smokers in my household. ✿There are no pets in my household. ✿Items are stored at home, including new and unused items, and are inspected by an amateur. Please only purchase if you understand that these are used items. ✿Although I inspect items, there may be minor tears or stains that are overlooked. Please check the photos carefully. ✿I also have other items for sale, including ladies' and men's clothing, daily necessities, books (manga, picture books), and exam preparation books. Please take a look. ➡︎ #ナポレオンmama for my listings (*^^*) Thank you for your understanding (⋆ᴗ͈ˬᴗ͈)” ✼••┈┈••✼••┈┈••✼••┈┈••✼••┈┈••✼