內容簡介 Rainy summer days are the worst for Zethurah and her sisters. But a trip to the library unlocks a world of adventure in the magical Land of Nova. It does not take long for the sisters to realize that they aren't in Detroit anymore. On their journey, they meet Princess Lillian, a talking unicorn warrior princess who needs their help. Will the sisters be able to help Princess Lillian protect Nova? Be sure to bring your superpowers, because there will be monsters and enchanted fairy dogs too!