My wife got into the books a few years ago when she got the first book as a gift from a friend. So ever since, I went ahead and bought her the hardback edition of each one, and reserved her copy of the new one that comes out this weekend. She enjoys them. I haven't read any of them because I mostly read sports or history books...this is my current read (
The Devil In The White City by Erik Larson), mostly when I'm sitting on the beach. I may read the Harry Potter books to my daughter (granted she's not born yet, but you tend to think of these things while waiting for her arrival) when she's old enough to understand...
My wife also bought the first movie and we watched, and I have to admit, it's brings out the kid in me. The movies are fun, kinda get lost in it all. So, we own the movies as well. Took her to see Goblet of Fire at the IMAX in DC (Air and Space) and that was a neat experience. So soon here I'll be taking her to see the new one in the theater...