I’m really starting to doubt your brain power. Gone with the Wind is one of the most accurate books ever written about the Civil War - which is why it so influenced historians. Mitchell had grown up hearing the stories from Confederate vets and her family’s memories of Reconstruction. God only knows how many people delved into the history after seeing the movie.
It's a flipping work of fiction. I have a number of books which accurately portray the period; they are called non-fiction. My father has even more and Amazon.com has more still. Do you not understand the difference between fiction and non-fiction?