specifically in cover tama terra. san bruno. san jose, san mateo and walnut creek. mike mibach is in walnut creek. >> reporter: you talk about smart thieves. one law enforcement source telling me barnes and noble was targeted by a very sophisticated group. all stores were hit. thousands of customers possibly even more have their private banking information all swiped away with one swipe of the card. downtown walnut creek 1149 south main street. >> every once in awhile i will stop by and pick something up. >> reporter: barnes and noble a hot spot for many book enthusiast. >> it's something about browsing through books on a book shelf. >> reporter: it has ban hot spot for many sophisticated criminals. those pin pads were compromised within dozens of stores across nine states. a spokeswoman for the company said the criminals planted bugs in the tampered pin pad devices allowing for the capture of credit card and pin numbers. >> it's never safe. not even online. >> i feel pretty safe swiping my card. >> reporter: any concern about the security of your account informatio