If the order is to your satisfaction you may proceed to our secure server to enter your account number and mailing address. If you prefer not to use the web, you may send us a check or money order. We also accept purchase orders on company letterhead. We will confirm your order by email if you include an email address. All prices are in US dollars.
Inquiries regarding commercial licenses and educational and quantity discounts are welcome.
A friend recommended it. I read the review in Sky and Telescope online . Ha ha, none of those. Complete source code. Cross references throughout the text.