Lara recommends The King's Equal by Katherine Paterson

A picture book broken into short chapters,
The King's Equal is about an arrogant prince who can only become king once he finds a bride he considers his equal. Seeing nothing short of perfection in himself, he rejects many of his potential princesses outright, before encountering the beautiful and mysterious Rosamunde. As a peasant in disguise, Rosamunde challenges the king's perception of perfection and equality when she flips the king's task on its head, and tricks him into living as a peasant for a year in order to prove he is equal to her. Beautifully illustrated with a message that resonates in contemporary culture, this fairy tale is an unjustly overlooked classic.
Publisher's description:
In order to wear the crown of the kingdom, an arrogant young prince must find an equal in his bride. Instead, he finds someone far better than he.