From the Publisher:
Laura's adventurous grandmother sends her a birthday charm to add to her silver bracelet, just as she does each year. This time it's a golden cat and it's gorgeous! But at her birthday sleep over someone steals it. Does the thief belong to the Populars or the Fringesthe two competing girl groups at the party? Luckily, Laura's mother is a private investigator and takes time out from tracking down the One-Eyed One-Armed bandit to help her with ideas.