All sales are subject to availability. We make every effort to ship orders within two business days. Virginia residents please add 6.00% sales tax. Library and institutional billing requirements are accommodated. Returns: We accept returns for any reason within seven days of receipt provided we are notified in advance and the book is returned in the condition it was sold. If the book is not represented accurately we will cover return media rate shipping. Shipping costs are based on books weighing 2.2 lbs, or 1 kg. Multi-volume sets, heavy and over-sized books may require additional shipping, particularly if shipped internationally. In this event you will be contacted before the order is processed. The above noted exceptions may apply. We make every effort to respond promptly to inquiries (please note that we are not in the shop Monday and Tuesday so we will respond to any inquiries on Wednesday).