I am looking for the following children’s book.
It is about a selfish prince who sends out people to find him a bride. Each time they bring back a princess he rejects them until he meets Rose. Rose refuses to marry him for a year while she rules over his kingdom and changes it from a selfish place to a generous and happy place.
It’s The King’s Equal by Katherine Paterson.
https://forgottenstoriesweb.wordpress.com/2019/07/12/the-kings-equal/
Possibly the picture book edition of this title (it is also published as a chapter book).
The King’s equal by Katherine Paterson. (1992)
n 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. Who is she? A dying king makes his son his heir–on one condition. Vain Prince Raphael must marry a woman who is his equal in beauty, intelligence, and wealth … Where is this woman? A search throughout the kingdom proves fruitless. Then the lovely Rosamund appears at the palace, as if bymagic, and Raphael is certain he has found his wife. She is intelligent and wealthy, as well as beautiful–certainly his equal, he thinks. But what does the mysterious Rosamund think?