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The author has released a series of e-books on her official website, Pottermore, and there is outcry from many surrounding this blunder...
It feels like the Harry Potter universe has breathed a new lease of life this year.
A new film is just around the corner, an 8th story is on the stage in London and most recently, J.K Rowling has penned a series of new books on official fan website, Pottermore.
The latest short story is about the history behind the Magical Congress in the United States of America which likely coincides with the plot of new film 'Fantastic Beasts and Where To Find Them' which is set in the USA.
However many an eagle eyed reader has noticed one glitch in the story that conflicts with actual American history - can you spot the gaffe?