"Complete Mastery of High-Level Mathematics I・A・II・B・C [Vectors] ‹ Revised Edition ›" Akiho Yonemura, Yoshiaki Sugiyama Price: ¥1200 Entrance Exam Mathematics "Skill Enhancement" Problem Collection, 2nd Edition With Answer/Point Explanation Collection These are being sold as a set, and both have writing in them. Please understand this before purchasing. You can expect a significant level up by working through the problem collection after reading the high-level book. With these two books, I passed the former Imperial University AO entrance exam without going to a cram school. I hope they can be of help to you. #AkihoYonemuraYoshiakiSugiyama #AkihoYonemura_YoshiakiSugiyama #Books #Nature/Mathematics