Just three days after Amazon announced that its Kindle e-reader had become the best-selling product of all-time on the company’s website, Barnes & Noble has issued a similar quip. “With millions of NOOK eReading devices sold, the line has become the company’s biggest bestseller ever in its nearly 40-year history,” reads a press release. “The new NOOKcolor Reader’s Tablet, introduced just eight weeks before Christmas, is the company’s number one selling gift of the holiday season.” B&N also went on to note that it “now sells more digital books than its large and growing physical book business on BN.com.” While the vague statistics being foisted upon us are impressive, neither Amazon nor Barnes & Noble will release or comment on the exact sales figures of their respective e-readers. For now, they are both the best… ever.