Please check the self-introduction first. This is a set of 18 paperback books by authors such as Keigo Higashino, Kanae Minato, and Seishi Yokomizo. Also included are Yasuo Uchida, Keisuke Matsuoka, Akira Serizawa, and Seiichi Morimura. The condition is not too bad, with some books still having their bands. However, as shown in the photos, there is some wear and yellowing, so please refrain from purchasing if you are sensitive to these issues.