This is what my child was reading. A total of 16 books: volumes 2, 4, 6, 7, 8, 9, 20, 21, 25, 40, 41, 44, 45, 46, 47, and 50. Each is a hardcover book with a list price of 1000 yen (excluding tax). Volume 46 does not have a cover. There are some tears, stains, scratches, and folds on the covers here and there. Inside, some volumes have slight yellowing at the top, but there are no markings or stains, and I think they are fine for reading. I hope these can be of use to someone.