Four girls are about to become princesses But can they keep their kingdom safe? Read to find out-- and collect the full sheet of sparkly holographic stickers in every book In the Jewel Kingdom, four girls rule: Roxanne is the Ruby Princess, Sabrina is the Sapphire Princess, Emily is the Emerald Princess, and Demetra is the Diamond Princess.Sabrina the Sapphire Princess rules the beautiful Blue Lake. Her palace floats on top of the water like...