The Little Prince: The Planet of Music (The Little Prince #3)

The warrior Utians are a little confused by the strange behavior of Euphony, the diva whose singing sets the rhythm of all their planet's days. Recently, Euphony seems so sad, and she's been singing less and less. When the Little Prince and Fox discover that Euphony is singing the blues over a foreign prince named Ivory, things get too complicated even for them - because Ivory is from the land of the Flower Growers, the sworn enemies of the Utians...