From Bleeding Cool:
DC Comics and Barnes & Noble have had a fractious relationship on occasion. When DC Comics released 100 graphic novels as a digital exclusive on the Amazon Fire, Barnes & Noble, owner of the Nook, pulled all those books in print from the shelves. It was quite a thing. Eventually, B&N blinked.
And of late they have been happy to run DC Days across all their stores and Marvel was able to use B&N stores to promote their floppy series Mosaic.
But Barnes & Noble also sells floppy comics as part of their magazine newsstand offerings. However, in 2013, they stopped selling Marvel Comics titles, while still selling plenty of DC, Dark Horse and Archie.
But as of late last year, it seems that offering now no longer included DC Comics.
Link to the rest at Bleeding Cool