Barnes & Noble takes 50% offNOOK books and 50% off other clearance items during its After Holiday Sale. That's one of the best sales of its kind that we've seen in recent months. (For further comparison, we saw 30% off one item on Black Friday.) Shipping adds $3.99, or spend $25 or more to qualify for free shipping. Select NOOK books from popular authors like Kim Harrison, John Grisham, Janet Evanovich, Tom Clancy, James Patterson, Dan Brown, Dean Koontz, and more.