Books will not be accepted if they are in the following conditions: have missing pages, obscured or unreadable text; have signs of mold, mildew or corrosion; have notable staining or liquid damage; are damaged in a way that renders them difficult to use; are missing essential accompanying material or parts; require repair or service; were not created by original manufacturer or copyright holder; any aspect is obscured and not able to be read or viewed because of markings, stickers, or other damage; books that have been rebound.