Just talking about Edge of Eternity, over 900 pages and my Nook library book expired. I can usually keep reading it after it expires as long as I don't "exit" the book. Well, last night, I accidently "exited" back to the home page, so it was gone. There's too long a waiting list at the library, so I just went ahead and bought it. I guess I can afford to buy a book every year or so ... at least it's on my Nook and I don't have to try to hold up a 900 page book while trying to read in bed. I could break my nose when I fall asleep. LOL