I never even go into the B&N Library of my nook. I put all of my books into Calibre and then side load them into the Nook. So when I view my books I only go into "My Documents".
Having said that, I used to go onto the B&N website and "archive" my purchased books once I read them. But I haven't done that in awhile since I haven't gone into "My B&N Library" on my Nook in awhile.