Harry Potter - almost done!

I've been reading the Harry Potter books as quickly as I can.  I think I started Labor Day weekend, and now it's towards the end of October.  About 1.5 months and I'm finally done with Book 6.  One more book to go!  These books are so good!  I can't stop reading...I read in the car on the way to and from dance, I read anytime I can.  Those bricks have been attached to my hip for weeks.  I love them.  But what am I going to read after?