Sales of Kindles?
They have a lot fewer books these days and their main competition went out of business (Borders). They make money on trinkets, coffee, etc.
B&N has the competing Nook which is not very successful.
But while tablet sales exploded over the Christmas season, Barnes & Noble was not a beneficiary. Buyers preferred Apple devices by a long mile but then went on to buy Samsung, Amazon and Google products before those of Barnes & Noble, according to market analysis by Forrester Research. “In many ways it is a great product,” Sarah Rotman Epps, a senior analyst at Forrester, said of the Nook tablet. “It was a failure of brand, not product.