To purchase online with a credit card, bank account number, or Paypal account, click the
"add to cart" button below the title you wish to purchase. To purchase copies of both
titles, you will need to add one to your cart and return to this page to add the other. Once
a book has been added to your cart, you will be able to adjust the quantity.

When making your payment, please confirm your shipping address before submitting the
order. If you've used Paypal before, please check the shipping address carefully, as Paypal
may automatically insert a shipping address you've used previously.

[Note: If you need the book(s) sent right away, you should use a credit card rather than an
e-check. Credit card payments clear instantly, but e-checks take a few days to clear.]