Anna & Elsa #5: The Polar Bear Piper (disney Frozen) by Erica David

Princess Anna, Queen Elsa, Olaf the snowman, and all the stars from Disney Frozen are back in an all-new magical chapter book series perfect for girls and boys ages 6 to 9. Even though Arendelle is a cold, snowy place, polar bears are still a very rare sight--until now! A family of polar bears has appeared on the outskirts of town and have started to cause mischief. Olaf loves the bears, but Elsa and Anna need to find out why they have suddenly appeared--and how to get them back to their Arctic home!