​It's been twenty years since Harry Potter and the Sorcerer's Stone hit the shelves and introduced the world (the muggle world) to the Wizarding World, and yet there are still secrets to be discovered.

An in-depth bibliography about the J.K Rowling's literary journey entitled JK Rowling: A Bibliography 1997-2013 by Philip Errington is apparently so detailed, the author stated the book is "slavishly thorough and somewhat mind-boggling."

Here are only ​some of the secrets that were revealed in the book.

1. Harry Potter and the Goblet of Fire Was Almost Titled Something Else

Harry Potter and the Goblet of Fire

Apparently, this book had a few working titles, and some of those Rowling played around with included: "Harry Potter and the Death Eaters", "Harry Potter and the Fire Goblet", "Harry Potter and the Three Champions".

Is it me or does the actual title work best? Or I could have a bias since I'm so familiar with the fourth book's title already.

2. Rowling Re-Read Prisoner of Azkaban So Much That She Was Sick of It

Harry Potter and the Prisoner of Azkaban

Repetitive things can get quite boring and I don't blame Rowling for getting annoyed with her story when she had to go over it again, and again, and again, and again... yeah, I can see how that gets someone sick.

3. Nearly Headless Nick Nearly Had a Song

Nearly Headless Nick

According to the author, there was a painful cut that resulted in us readers losing 'The Ballad of Nearly Headless Nick.' It's a shame really since he was one of the nicer ghosts of the castle. But according to Rowling the ballad was "superfluous to requirements," and thus was reluctantly cut.

4. Rowling's Literary Agent and Her Publisher Had to Be Secret Agents to Get a Manuscript

Whether or not it was to keep everything secret and out of prying eyes, or because they couldn't trust regular mail to be reliable, Rowling's literary agent and her publisher met at a bar to have some drinks. However, her publisher walked away with the carrier bag that Rowling's agent had carried in and put down, and thus the transfer was complete! Inside was none other than the manuscript for 'Harry Potter and the Order of the Phoenix!'

5. The Manuscripts Were So Secret They Were Kept in Rowling's Publisher's Safe

Harry Potter

Wow! That's some level of security for an unedited manuscript. But I guess this was the Game of Thrones of its time and any secret that got out was precious; nothing could be spoiled. Apparently, Rowling's publisher got so paranoid, he covered up her manuscript with a few torn pages from another manuscript to mask the 'Harry Potter' one underneath!

Hmm... now I wonder what more secrets are in these books!