Borders has a new coupon valid through Monday, Feb. 8, 2010. Buy one book and get the second one 50 percent off -- which amounts to a 25 percent discount if the books are the same price. If one book is cheaper than the other, the discount comes off the lower-priced book, which reduces your overall savings.

Print the Borders coupon here or online use code SAF8618B. The coupon is also good at Waldenbooks and Borders Express. The coupon only applies to books.

Caveats: you must be a Borders Rewards member to use; box sets count as one item, cannot be combined with any other offer, excludes previous purchases, special orders, bargain books, gift cards, magazines, eBooks, digital downloads, and shipping. One per person.