Once you have completed your order through our online bookstore, you are not able to cancel or make any changes; however, our service team will be happy to help you. Please call 1.800.661.9800 Monday to Friday, 7 a.m. to 4:30 p.m. PT (except Wednesdays, 2:30 p.m. to 3:30 p.m. PT) and we will be able to cancel or change your order. Please note: It’s important to call us the day that your order is placed, or as soon as our office opens the following day(s), so we are able to make the necessary changes before your order is processed and shipped.