Disney has a number of Little Mermaid cartoon books. Both the full version of the story and very short versions. There are differences, mostly in Ariel's transformation, in the books compared to the movie and other books. The Little Mermaid Disney's Wonderful World of Reading In one book, Ariel is changed into a human. Sebastian and Flounder watch as she changes and after the transformation. As she struggles for air and starts to drown, her friends realize that she can no longer live underwater.