One of the things I absolutely love about reading books in iBooks is the ease with which I can look up an unfamiliar word (or a familiar word being used in an unfamiliar way) using the built-in dictionary. We have always been told since childhood that we should look up words we don't know, but it was always too much bother. Now it's easy. So easy I look up words all the time. In fact, I do it so much, I have found myself trying to do it in other apps and on Web pages. I want it in real life! So I was delighted by the announcement that the dictionary is going to become system-wide in iOS 5. Am I the only one who cares?