This offer provides an additional 15% on top of the trade-in value when you sell your books at World of Books. It cannot be used in conjunction with any other promotion, discount, or voucher and applies only to trades completed through www.WorldOfBooks-SellYourBooks.com. The offer is subject to availability and may be withdrawn or amended at any time without prior notice. By participating, you agree to the General Terms of Use. Misuse of the offer may result in cancellation of the trade and forfeiture of the bonus.