These books are in good condition for use. All pages are clean except for the pre calc 2.0 teaching textbook. It has some highlighting, answers filled out, etc. A lot of the writing is in pencil so it could be erased. All orders are shipped with tracking and delivery. If you're not completely satisfied with your purchase, you may return the item for a full refund. If you have any questions, feel free to reach out—we're happy to help. Thank you for shopping with Parish Picks!