I know it's a little early to be thinking about summer assignments, but reading doesn't have to be like homework so I'm getting you started now.
If you're looking for an awesome book to read this summer, look no further than The Guide to Good Reading. Books are organized by genre to make searching easier. There is also a grade level Top Ten for a quick list of some of my favorites.
And if you if you want some suggestions to get you started, here are the titles on Mrs. J.'s Top