Instant purchase is welcome. I will ship via "Rakuraku Mercari Bin (Nekopos)". If Yamato refuses due to thickness/weight, I will change to "Yuyu Mercari Bin (Yuu-packet Post)". Bundle purchases are welcome. My eldest daughter passed the medical school transfer exam this year using this text, so it's considered lucky, but it's full of writing. Some pages are wrinkled (photos 4-6). [Product] A set of textbooks and answer keys perfect for studying Math IA/IIB for high school freshmen and sophomores using Study Sapuri. - Title: High School Freshman/Sophomore Standard Level Math IA/IIB Part 1 - Title: High School Freshman/Sophomore Standard Level Math IA/IIB Part 2 - Answer Key: High School Freshman/Sophomore Standard Level Math IA/IIB Answer Key Originally purchased by my second daughter when she was a student, so it was published in June 2023.