“Introduction to Mathematics I & A: Essential Problem Solving” Yosuke Ikeda Price: ¥1200 The book is in good condition with no stains, scratches, or writing, but as you can see from the third image, there is a slight crease on the cover. I am also selling “Essential Problem Solving,” so please take a look if you'd like. If you purchase the set of “Essential Problem Solving” and “Introduction to Mathematics I & A,” I will sell them for ¥1790 m(_ _)m If you have any questions, feel free to comment! Price negotiations are also welcome. Thank you for looking. #YosukeIkeda #Book #Nature/Mathematics