Fun to solve, a math workbook that makes your brain happy. - Title: G Note 4th Grade Math, All 30 Books - Publisher: Fuji Kyoiku - Series Name: G-Brain Workout - Target Grade: 4th Grade - Language: Japanese Thank you for viewing. List price: 880 yen per book, 30 books x 880 yen = 26,400 yen Almost unused (like new), but the covers are fragile and only volume 5 has a slight scratch on the back. No writing (I have checked, but I apologize if I missed anything). Please refrain from purchasing if you are sensitive to used items due to personal storage. Please consider only if you have no issues.