Today, I’m going to use economics to dissect “The Fairy’s Mistake” by Gail Carson Levine: 87 short pages that can be read in an hour. Levine writes charming fairy tales. “Ella Enchanted”, probably her most famous, is about how the use of power leads to unintended consequences, and why liberty is to be desired above all else but requires hard work and bravery to attain. “The Fairy’s Mistake” is also about unintended consequences.