October Novel Prep Challenge

It can help to emphasize themes of your story if you name chapter titles after themes as well as events, even if they're not song titles; but songs that resonate with readers can help them connect with your themes and characters, like a soundtrack in a movie.

You've heard of picture books - 'sound e-books' might become the next trend (though you would need a limited licence from the copyright owners to use their songs unless you commissioned a composer to write an original score).