Your Satisfaction Is Guaranteed

I want you to be completely satisfied with every product you purchase from Professional Publications. Every PPI product is fully guaranteed. If you are dissatisfied with your purchase for any reason, you may return the product(s) within 30 days of receipt for immediate credit, or refund*. Shipping and handling are not refundable. Instructions for returns are included on the packing slip that arrives with your purchase.

If you have comments about any product we offer, I want to hear from you. You can contact me by email or by regular mail at Professional Publications, 1250 Fifth Avenue, Belmont, CA 94002. I will personally review anything you care to write. Thanks to the many engineers who have sent me comments on and suggestions for my books. Since 1975 PPI's products have improved steadily and my goal is to continue this trend.

--Michael R. Lindeburg, PE
Editor-in-Chief

*We are unable to accept returns for products purchased through the Volume Discount Program. Please only order the number of products that you plan to use. Out of print books can be exchanged for the same number of books within 30 days of invoice.