This item is the second half (Volumes 15-25, and supplementary volumes 1-4, totaling 16 books) of a complete set of 30 volumes. As the complete set is sold as a whole, we kindly request that you purchase both the first half and the second half of the complete 30-volume set. This complete set includes all 29 volumes and 30 books, from Volume 1 to Volume 25, and supplementary volumes 1 to 4. Due to shipping considerations, the complete set is divided into two parts and sold in two boxes. (All volumes and books are included in the two boxes.) This complete set is a rare book with a limited print run, printed in three installments: April and October of 1991, and March of 1992. Many volumes are unused, but there are age-related stains on the outer boxes and the top and front edges of the volume bodies (multiple photos attached). The printed surfaces, including the margins, show almost no stains within the range of a few volumes that have been opened. However, Volume 6 has stains on the top and front edges of the outer volume that have discolored the margins of the printed surface. Photos of this area are also attached (p158 top edge and p38 front). Please understand that there may be other age-related changes. The total weight of the 30-volume set is approximately 40 kg, and the total width when the books are placed upright on a horizontal shelf is approximately 130 centimeters. The depth of the books with covers is approximately 17 centimeters, and the height is approximately 23.5 centimeters. Two of the volumes are approximately 26.5 centimeters square and approximately 27 centimeters deep, and 38 centimeters high. Please refer to the attached photos.