Literary mysteries: Is there more "Harry Potter" coming?

Harry Potter book ready for shipping
When the last "Harry Potter" book came out in 2007, Amazon shipped 1.2 million copies on the first day.
Justin Sullivan | Getty Images 2007

For Literary Mysteries, The Thread tackles your book questions, big and small. Ask a question now.

This week's question: Will J.K. Rowling release any more "Harry Potter" books?

The last book in the powerhouse "Harry Potter" series was released almost 10 years ago, in the summer of 2007.

The series may have had meager beginnings — the publisher printed only 1,000 copies of the first book — but by the time the floo powder settled, more than 400 million copies of the books had been sold worldwide.

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Rabid fans have never stopped asking: Will there be more?

In 2007, Rowling responded to the question on everyone's mind. She said that Harry's story had come to a clear end, but that "I've always said that I wouldn't say 'never.' ... In 10 years' time I might want to return to it, but I think it's unlikely."

Since then, she's published several unrelated books, including a spy series under the pseudonym Robert Galbraith. But she can't keep away from Potter.

In 2011, Rowling launched Pottermore, a website devoted to all things Harry. Since then, she's released hundreds of unpublished details on the site about characters' backstories and other mysteries. (Want to know why the Dursleys really hate Harry?)

And now, she's picking up the pen again — but not for a book.

Two new Potter projects are coming: one on the screen and one on the stage.

Rowling is writing the screenplay for a trilogy of films called "Fantastic Beasts and Where to Find Them." (Avid Potter fans will recognize the title as one of Harry's textbooks.) The events of the trilogy unfold seventy years before the books begin. The first film is scheduled to hit screens in November 2016.

Last week, Rowling announced that there will also be a Harry Potter play, debuting next summer in London.

"Harry Potter and the Cursed Child," she said, will reveal "an untold part of Harry's story." Rowling is collaborating with writer Jack Thorne on the project.