Magic Pony Carousel #2: Brightheart the Knight's Pony by Poppy Shire

The Magic Pony Carousel has come to the town fair! Amy wants to ride the beautiful dark bay pony named Brightheart. As soon as she settles into the saddle, the magic carousel whisks them off on an adventure. She and Brightheart travel back to the days of knights and princesses. Will she be able to learn to fight like a knight in time to help a young prince?