Prices are subject to change without notice. If the amount of your order increases by more than $10, you will be notified prior to shipment. Booksource is a wholesale supplier of authentic children's literature for the education industry, and as such, only ships to commercial addresses. Books may be returned within 30 days. Returned items must be unused and in a condition allowing them to be resold. eBooks cannot be returned unless there is a default or error in the file. Turtleback Books cannot be returned unless flawed. Books with attached labels cannot be returned. Free shipping within the continental United States. For all other orders, customers will be billed actual freight costs. To receive terms of net 30 days, please provide an authorized school purchase order or letter of guarantee. Visa, MasterCard, American Express and checks are accepted.