Woohoo! It worked! And Mickey, it came back in English, with different books than I had originally. I had had a mix of French, English, and Russian books, but now they are all English. And interestly enough, the original English book is not there now. But that's OK; before I started playing around, I copied all the books off, just in case. In any case, I can now open my books.
So now I have a fresh, clean, unmucked with 360 to play with! Thank you all so much! and Schnitzel, don't worry about the mistake. It's taken care of now, and you were a big help.