EXCELLENT – This is new unread book that was sitting on the shelve for some time so there is some visible shelwear on it. VERY GOOD - Carefully used book which may have some minor imperfections like small creases on the cover, may be dusty or in case of hardcover may have some minor imperfections on the dust jacket. GOOD – This is a read book which comes with creased spine and in case of hardcover some damage to the dust jacket. ACCEPTABLE – Heavily used book, may contain notes or highlighting, dust jacket is usually severely damaged or missing.