You might not have known, but Taylor has written a nonfiction book before. Though, the book wasn't published. All the way back in 2014, the singer did an interview with AP and revealed that she once wrote a large book when she was younger.
She said that, "When I was little, I was about 14, maybe 13, I can't remember. I wrote this book, I wrote like a 400 page novel about my life and my friends. It was loosely based on my life, but it was a different character [that] was the main character."