Well, Betty, it sounds like your Nook is improving. As others have said, you should give them a few recharge cycles to learn the battery. But going down to 89% in a little more than 2 days is still somewhat too fast. It should lose about 2 to 3% per day. Even my problematic Nook, once I have topped it off, loses this 2 top 3% per day amount.
Hard to know what to advise, because it does seem to be improving. Before I top off my misbehaving Nook, it will drop to 89% over ONE night. So it almost sounds as though your Nook may be OK once you have it for awhile.
See what it is tomorrow. If it's down to like 79 or 80, I'd return it. If it's say 85, I think I'd keep it (I suppose it will be 83!