I read on my Nook and Nook color for years, now am using the Nook app for my iPad . I think this is the best reading app. I can archive from my iPad with Nook but not from that other popular app, which is an added bonus. Easy to download books. Using the other app books are either in the cloud or on the device which confuses things. I really do love being able to download books and have them with me when I travel.
FunAt70+ about Barnes & Noble NOOK, v4.5.1