Four girls are about to become princesses! But can they keep their kingdom safe? 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. Princess Emily has always loved a good joke. So when someone is inured in what looks like a prank gone wrong, everyone suspects her. Emily must get to the bottom of what really happened -- before anyone else get hurt. A full sheet of holographic stickers in every book!