going back to library before quitting seems to work. Thanks for the advice.
New problem: I have purchased books in iTunes and tried to sync them to iPad and they sinmply don't go onto the iPad, whether I check "Sync all" or "Sync Checked titles." It's obviuosly frustrating because I've bought the book....I can see it there on my computer but it won't download to either iPad or iPhone. Is anyone else experiencing this and can anybody suggest a work-around?