Thieves hacked into Barnes and Noble credit card swipe machines to steal credit and debit card data. According to http://abcnews.go.com/WNT/video/barnes-noble-customer-credit-card-info-stolen-17557470 B&N has removed all swipe machines from their stores nationwide.
This is not the first time such a theft has occurred. Last year, Michaels crafts stores were hit by a similar scam.
The FBI is investigating.