J.K Rowling is definitely one person who we couldn't outsmart in a pub quiz.
However, one very dedicated (and smart) J.K Rowling fan has only gone and correctly guessed the title of her next book, the fourth Cormoran Strike novel.
After JK was asked on Twitter to give a hint to what the book would be called, she said that she would confirm if someone correctly guessed the title.
Using the form of a typical Dumbledore-esque 'I open at the close' riddle, she hinted that the title was two words made up of H / H _.
What a clever muggle!
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