The author of “Harry Potter” is most definitely at work on a new novel. She told us as much before driving us all crazy with an anagram, but Rowling hasn’t said specifically what the book is yet.
Chances are good that it’s another Cormoran Strike mystery — which would be amazing because those books are fantastic — but Rowling has surprised us before.
Recently, Daily Mail thought it had itself a scoop on what the novel might be. I’ll let Rowling’s Twitter feed take it from here.

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