Purchase discounted books for your nonprofit organization in bundles of 12 or more. Email proof of nonprofit status to info@refuelinginflight.com. Upon receipt, your boxes will be ordered. Please be aware that shipping times can vary for discounted book bundles. If you are working with a time constraint, please contact us before ordering and we will inquire of the most current ship times for the discounted books. Please note the shipping charges listed below are calculated for shipping within the United States. If you would like your order shipped outside of the United States, please contact us prior to placing the order and we will calculate the appropriate shipping rate.