Beauty in a Box — Michelle L. Levigne

A princess suffering from too many makeovers comes to the enchanted castle, seeking help in finding her inner beauty. The search for the right magic to help her leads 'Na and her new friend to a room of torture -- otherwise known as a beauty parlor -- where they accidentally open a box chained shut for 50 years.  What they find inside, and who is responsible for the prisoner, threatens to change preconceived notions of true beauty.