I thought about ordering it from the library, but then it occurred to me that I have yet to read the book the upcoming Harry Potter film is based on—I try to stay just one ahead. Upon looking at the cover, though, now I think I did read it. So, now that I'm caught up, I need to decide whether to keep on as I have been, or to quickly read The Half-Blood Prince so that I can read the final book of the series when it comes out. That moment won't happen ever again.
By the way, if you're looking for a steady source of book recommendations, the Williamsburg Regional Library blog Blogging for a Good Book offers about one a day.