Out of the 11 books in the photo, "University Entrance Center Test Question Study: World History '93" (Kyogakusha) is quite worn and has writing in it. This is for those who want to see the questions from the era of the Joint First Stage Achievement Test. Please see the second photo for the Joint First Stage Achievement Test questions included. The "Center Test Trial Test" questions are, I think, quite valuable. I think this series from Sundai is the best commentary book for Center World History.