Published in 1995, 1999, and 2000. A total of 4 books: "The Four-Dimensional World," "The Four-Dimensional Clock," "Witch Angel," and "Tale of the Raven in the Dark Night." "The Four-Dimensional World," published in 1995, shows some wear on the cover due to its age. The other 3 books are relatively clean. Two of the four books have some yellowing, which is commensurate with age. No mold or tobacco smell. When setting the price, I referred to listings on Amazon, but some items had premiums, with prices exceeding 1500 yen and 2000 yen including shipping. This set is priced lower than the total amount of the Amazon listings for all 4 books♪