For what it's worth, there's more to read about Harry Potter. Mugglenet.com has some pretty good fan fiction. Fan fiction on the net is pretty dire, but that particular site is so well trafficked that the quality is better than most.
There's also Mugglenet.com's book "What Will Happen In Harry Potter 7?" It's not bad for extracting a few alternative realities. They actually got a couple of crucial plot points spot on, but a few others were off, as you'd expect. But the quality of analysis is high - again something that's predictable, with the amount of resources they have to draw upon.
But don't read that book before Deathly Hallows - it's a bit of a spoiler. Deathly Hallows is a very good read, and doesn't bear spoiling.