I forgot to mention in class a novel series that is a retelling of a common fairy tale. Anne Rice wrote under a pseudonym of A. N. Roquelaure. The series is the Sleeping Beauty Series. The books in the series are The Claiming of Sleeping Beauty, Beauty’s Punishment and Beauty’s Release. They are a slight badly written BDSM storyline about what happened to Beauty after the prince woke her up.
Yet another example of someone borrowing storylines to make new adventures is Gregory Maguire. Most of his books are retellings of other peoples works. He has a series built on the Wizard of Oz, a book on Cinderella, and even Snow White.
So even though some may say that it could be a bad thing to rework other people’s works some authors find success in doing so!