'Harry Potter' Books, Movies & Characters: Top 10 Facts You Need to Know Before 2015 Ends

Although the "Harry Potter" books and films have come and gone, there's always something new about the boy who lived that Potterheads learn every day. 2015 was particularly a generous year for fans as more details about J.K. Rowling's masterpiece come to light.

And as the year winds down, more fun facts about and involving Hogwarts and beyond continue to emerge. Here is a list of 10 facts that fans would love to know about the saga:

1. With the popularity of the books, it feels like everyone has read them. Unfortunately, it isn't the case for singer Katy Perry, who was prohibited by her parents to read them, thanks to her conservative upbringing. "Growing up, I wasn't allowed to have any fantastical, enchanting stuff around me," she told People magazine.

2. These books really are magical. As per Refinery29, a research has found that the "Harry Potter" books can cast out prejudice. With students of all ages as participants, the Journal of Applied Social Psychology learned that those who read the books and identified with Harry Potter turned out to be more accepting and open to the stigmatized groups.

3. Rowling does not get tired of dropping bits of trivia about the "Harry Potter" books. This year, she revealed why Harry's son Albus Severus was named that way. The author also revealed, as per The Huffington Post, that Slytherin is no longer evil and that Harry cannot speak Parseltongue anymore.

4. There were a lot of options for the title of the fourth book in the series. After considering "Harry Potter and the Death Eaters," "Harry Potter and the Fire Goblet" and "Harry Potter and the Three Champions," Rowling ultimately went with "Harry Potter and the Goblet of Fire."

5. For those who are still wondering why the American edition of the first book in the series is called "Harry Potter and the Sorcerer's Stone" and not "Harry Potter and the Philosopher's Stone" (British edition), EW revealed it is because editor Arthur Levine, who holds the U.S. rights of the book did not feel that it put across the magical theme of the series, at least for the American readers.

6. This American and British terminologies also led Levine to list 71 questions about "Harry Potter and the Deathly Hallows." An annotation, as listed by EW, read :"If you mean underpants and not trousers here, can we spell out 'underpants' for the U.S., so readers understand fully how embarrassing this is for Ron?"

7. Bloomsbury had something called an HP Bible, a guide that lists the spells and characters in the book, that helped them make sure they were consistent as they edited the books.

8. In the midst of Rowling's saga's popularity and the wait for the sixth installment, Bloomsbury founder and chief executive Nigel Newton was careful not to leak anything about "Harry Potter and the Half Blood Prince."

Newton recalled how Rowling's then-agent masked their meet up for the manuscript with a drinking session. "I was almost frightened to be in physical possession of [the manuscript]," Newton said via EW, adding that he hid it under his bed.  

9. Bloomsbury had more bids to keep the manuscript from prying eyes. The manuscript from "Deathly Hallows" was cloaked by the publisher by naming the files "Edinburgh Potmakers" and "The Life and Times of Clara Rose Lovett."

10. Finally, to make sure that no leaks online will take place, Bloomsbury made sure to store the manuscript were stored in editor Emma Matthewson's computer that wasn't attached to the Internet. "No hacking in the world could get at something that wasn't plugged-in."