Facebook is celebrating the 20th anniversary of 'Harry Potter' with a secret feature — here's how to find it

Twenty years ago, J.K. Rowling published "Harry Potter and the Sorcerer's Stone." Today, Facebook is celebrating the series with a little bit of Muggle magic.

26 Jun 2017 ... Twenty years ago, J.K. Rowling published "Harry Potter and the Sorcerer's Stone. " Today, Facebook is celebrating the series with a little bit of ...

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