This set includes everything you need for classical Japanese (Koubun/Kanbun): the problem book, the learning workbook, and the answer key/explanations. The "Joukyuu Koten" (Advanced Classical Japanese) set also includes the problem book, the learning workbook, and the answer key/explanations. Brand new, unused condition. Highly recommended as it contains many problems! I also have other reference books for sale. Discounts are available if you purchase multiple items together. ^_^