The Harry Potter Empire.

Well will she write another book in the Harry Potter series of books.  Oprah Winfrey is showing an interview she had with author JK Rowling, one of the questions she asks is if she has any intention of releasing another book.
In July 2007, Jk Rowlings last book in the series, Harry Potter and the Deathly Hallows, was published. It  subsequently went on to become the fastest selling book of all time. Incredibly fans bought 8.3 million of the books in the first 24 hours.

Some people credit Jo with the fact that she has given more to literacy in recent times than any other author.  Time will tell, but I for one hope she considers another book.