Critical Path

Make payments directly with your VISA or MASTERCARD. All shipments via U.S. Post Office, Media Mail. If you require U.S. Priority Mail, please state so. Overseas shipping is at cost + $1.00. California residents an additional 7.75%, for state sales tax, will be requested after you order. All listed books are subject to prior sale. All prices are net. My return policy: All books guaranteed for 14 days and may be returned with advance notice if for any reason you're unhappy with your purchase. If I misdescribed the book I will refund your postage as well, otherwise the postage cost will be subtracted from your refund. Shipping costs are based on books weighing 2.2 LB, or 1 KG. If your book order is heavy or over-sized, we may contact you to let you know extra shipping is required.