The usual fairy tale goes: Prince Charming sweeps a princess off her feet, they ride into the sunset and that's where the story ends. But that's not how it works in Amelia Case's fairy tale universe.

Case, mother to 12-year-old Isabella and 9-year-old Sophia, is the creator of "Princesses with a Twist," a book series that gives readers a look at what life is like for princesses after their happy endings. She came up with this added layer of princess fiction to spread a message of female empowerment to her daughters and show that these classic characters can accomplish their goals -- even after they find their prince.