I purchased the complete set at a used book market. Due to the age of the books, there is overall damage and yellowing. Volume 21 has a shop stamp on the top of the book. There are no tears or stains that would hinder reading. Please feel free to ask if you have any questions. Volume 1: First edition Volume 2: First edition Volume 3: 10th edition Volume 4: First edition Volume 5: First edition Volume 6: 17th printing Volume 7: First edition Volume 8: First edition Volume 9: First edition Volume 10: First edition Volume 11: 21st printing Volume 12: First edition Volume 13: First edition Volume 14: First edition Volume 15: First edition Volume 16: First edition Volume 17: 26th printing Volume 18: 28th printing Volume 19: 28th printing Volume 20: 27th printing Volume 21: 23rd printing Volume 22: First printing