Buy More, Save More!

Our Perpetual Cumulative Discount applies to selected titles and earns you a bigger discount the more you buy.

Your discount is cumulative. If you buy five copies of a book today and another five copies of the same book later, your total is 10 books. You get the 10 percent discount when you place your second order, even though you didn't order 10 books at one time.

And your discount is perpetual. It applies to all the copies of a book you buy from us. You get a 10 percent rebate on your first five books along with the 10 percent discount on your second order.

Sorry, you can't get these discounts through retailers or when ordering online through the online shopping cart. Send us an email to order your books, and we'll send you a detailed invoice so you can see the exact cost before you pay.