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, Emily is the Emerald Princess, Sabrina is the Sapphire Princess, and Demetra is the Diamond Princess.Princess Emily has always loved a good prank. But when one of her subjects is seriously hurt, everyone...