News J.K. Rowling Handwrote an Entire Book on a Party Dress By Olivia Bahou Olivia Bahou Facebook Olivia Solomon is a New York-based writer and editor who covers all things fashion, lifestyle, celebrity, and pop culture. She was previously the Assistant Digital Editor for InStyle, and her work has appeared in many national publications. InStyle's editorial guidelines Updated on July 10, 2017 @ 12:30PM Pin Share Tweet Email J.K. Rowling has a history of writing best sellers in odd places (she wrote down her initial ideas for Harry Potter on a napkin!) but did you know she handwrote an entire book on a dress? The beloved author once went all-out for her Halloween costume—and there’s now an unpublished J.K. Rowling manuscript hanging in her closet. “The theme of my 50th birthday, which I held at Halloween, even though that’s not really my birthday, was come as your own private nightmare. And I went as a lost manuscript,” the 51-year-old told CNN. “I wrote over a dress most of that book. So that book, I don’t know whether it will ever be published, but it’s actually hanging in a wardrobe currently.” That's quite the effort for a Halloween costume. VIDEO: 9 J.K. Rowling Quotes to Get You Through the Day The manuscript in question is a “fairytale” once described as a “political book for children.” And while Rowling isn’t sure whether it will ever see the light of day, we have a good feeling that she could find a publishing house to release it—if she ever decides to bring it out of her wardrobe. J.K. Rowling's Message for the 20th Anniversary of Harry Potter Is Truly Magical The world could use another Harry Potter.