I have a regular Nook Simple reader. I've had the thing for almost a year and have not had any problems. plug it in today to add books to it and the computer is saying it's an unrecognized device. I tried different cords and even plugged it into my husbands computer. Nothing. I turned it off, left it off for a few minutes then turned it back on. Still nothing. I have to say, I'm getting extremely frustrated since I was adding the last book in a series and I'm anxious to find out the ending. I've browsed through the forums trying to find a solution but so far I've come up with zilch. Any help would be appreciated.