NEW YORK (AP) -- Bookseller Barnes & Noble Inc. on Thursday said its line of Nook e-reading devices are the biggest-selling items in its history, and added it sold nearly 1 million e-books on Christmas Day. The New York company said its Nookcolor e-reader, which launched eight weeks before Christmas, was its top-selling gift of the holiday season. Barnes & Noble also said it now sells more digital books than physical books on its Web site.