The bookseller purchased Borders' customer list in bankruptcy court. The list also includes records of customers' DVD and other video purchases.
In a letter posted on its website, Barnes & Noble said it purchased the customer list to try and earn business.
"Our intent in buying the Borders customer list is simply to try and earn your business. The majority of our stores are within close proximity to former Borders store locations," the company said.
The bookseller is offering Borders customers the opportunity to opt out of having their information transferred.