Here's a breakdown:
* Disney: Developed the Disney Fairies franchise, including the animated movies, video games, toys, and other merchandise.
* Gail Carson Levine: Wrote the fairy tale novels that served as the basis for the Disney Fairies movies. These novels are separate from the Disney franchise and feature different stories and characters.
So, it's a collaborative effort: Disney created the franchise and produced the media, while Gail Carson Levine provided the literary inspiration.