Katrin, from Sweden, is a HUGE Harry Potter fan.
But little did she realise when she first started reading the boy wizard books that they'd end up getting her a better grade in English.
She tells us why.
"After reading the first Harry Potter book in Swedish I was doomed. I was stuck in Harry's world and everything that had something to do with it.
I was officially obsessed with Harry Potter.
So after borrowing the first three books and buying the fourth one as soon as it came out in Swedish, I didn't know what else to do. I had read it all. But the fact that there were no other books about Harry and his friends didn't matter, they had started to make a film.
Back in the game