Princess Pru and the switcheroo
(Book)

"Best friends Oggy and Pru spend their days playing games, having adventures, and getting spoiled by shopkeepers. Then, every evening, Oggy goes home and does whatever he wants, while Pru returns to the palace where she must finish her vegetables, tidy her playroom, and go to bed on time. She’s had enough of the rules—she wants freedom! So Oggy and Pru hatch a plan for Pru to experience the easy existence of an independent ogre: they’ll disguise themselves as each other and switch lives with their hilariously apt transformations. But as time passes, Pru realizes that the life she resented as too limited was great after all. And when a dragon swoops in to kidnap the “princess,” their plan quickly goes awry."-,Amazon.com.