"A Comprehensive Guide to Understanding 3 Years of Middle School Math in One Book: Turning Weaknesses into Strengths!" Takuya Kosugi Price: ¥1000 #TakuyaKosugi #Takuya_Kosugi #Book #Nature/Mathematics There is one instance of writing in the book. There may be other oversights. I will sell this to someone who understands that it is a used book.