JK Rowling is setting up a website called "Pottermore" that will include background and information about the series and characters that has never been shared before. The first 1,000,000 visitors get access on July 31st, otherwise you have to wait until October. It's a great time to read or reread one of the best series ever!
Click here for an article abou the site or here to see the Pottermore home page.