Harry Potter fans are set to discover some fascinating secrets about the franchise, thanks to a new book titled Jk Rowling: A Bibliography 1997-2013. Compiled by Philip Errington, the book chronicles all of Rowling’s writing during the 16 year period, as well as giving fans some priceless insider details.

JK RowlingHarry Potter author JK Rowling

For example, Errington reveals that Harry Potter and the Goblet of Fire was very nearly titled 'Harry Potter and the Death Eaters', 'Harry Potter and the Fire Goblet' or 'Harry Potter and the Three Champions'.

Rowling is also revealed to have become sick of the Prisoner of Azkaban, thanks to the book’s extensive editing process. “Finally! I’ve read this book so much I’m sick of it, I never read either of the others over and over again when editing them, but I really had to this time,” Rowling is quoted as saying, in a letter to her editor Emma Matthewson about the third Harry Potter novel.

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“If you think it needs more work, I’m willing and able, but I do think this draft represents an improvement on the first; the dementors are much more of a presence this time round, I think,” the author adds.

Speaking about the 554 page book Rowling herself said, “As someone who respects comprehensive research, I am in awe of the level of detail and amount of time Philip Errington has dedicated to this slavishly thorough and somewhat mind-boggling bibliography.”

An author himself and the director for children’s books at auction house Sotheby’s, Errington spent five years scouring the archives of publishing house Bloomsbury researching the bibliography.

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“There is a lot of incorrect information out there and this is a chance to set the record straight with detailed research,” Errington told The Guardian.

“I’m very fortunate that Bloomsbury let me into their archives, and that I was able to interview key people. This could act as a map for the future … you can see how the Harry Potter series just took off.”