In a reprise of a deal they also offered a year ago, Barnes & Noble is offering 40% off a single book when you make the purchase using your MasterCard. The offer is available both online and in stores beginning November 26, 2008 and lasting through December 1, 2008 at 2:59am EST.

There are a number of items that are not eligible for the discount, including gift cards, gift certificates and textbooks. The coupons, along with the full list of exclusions and details can be found here:

Link (for B&N members)
Link (for non-members)
(Via SD)