A brand-new, fun-filled chapter book series that answers the question: What if Frozen's Elsa went to regular school? Princess Lina is loving groundling school. Her magic is still under wraps, she hangs out with BFF Claudia every day, and soon their class is taking a field trip to see penguins at the city aquarium Up in the sky, Lina's Granddad has decided to invite her mischievous cousin Jack Frost to give Lina extra tutorials in Winterheart magic. But when Jack tags along with Lina to school, his tricks wreak havoc on the big field trip. Can Lina keep her cool and save the day?