Takada Junior High School Entrance Exams Success Exam Specialists Last year, I purchased a 2-month preparation set of 15 problem books (45,830 yen total, 3,000 yen per book) and used 7 of them. This is a set of 3 unused books: 11, 12, and 13. Books can be sold separately. I think you can use these for your final check.