Set of two books: Z-Kai Grade Up Problem Collection Elementary 3rd & 4th Grade Science & Social Studies I purchased these for junior high school entrance exams, but I'm selling them because I don't think I'll use them due to a move. There is writing on the first page (only one page) of the Science book. It seems to have been written with a ballpoint pen, so it hasn't been erased and is left as is. I didn't find any writing in the Social Studies book. I hope someone's child will use them. #Z-Kai #GradeUp #JuniorHighSchoolEntranceExam #February #ElementarySchoolStudent #3rdGrade #4thGrade #Science #SocialStudies #JuniorHighSchoolStudent