Thank you for viewing. Please be sure to check the profile. ・I am not an expert, so I cannot answer detailed questions. ・There is some yellowing on the spine. ・There is a stain on the inside cover as shown in the fourth photo. We will offer a small discount if you purchase multiple items. ・We do not mention yellowing or fading due to aging unless it is significant. Please check the photos. If you are concerned, please feel free to ask in the comments. The underlying assumption is that the item is a used product and can be read without problems. ・If you have any other questions, please contact us before purchasing.