All items, as usual, are guaranteed as described and are returnable within 30 days if not as described. Within the United States, all books are shipped UPS unless otherwise requested (please provide a street address). Overseas orders should specify shipping preference. All postage is extra. New clients are requested to send remittance with your orders. Libraries may apply for deferred billing. All New York and New Jersey residents must add the appropriate sales tax. We accept American Express, Master Card, and Visa. All items are subject to prior sale; prices are subject to change.