nEight-year-old Nancy Drew has her first case to crack Can you help? n Nancy and her two best friends, George and Bess, are so excited They have been invited to Deirdres sleepover party There will be pizza, cake, and even a pajama fashion show. But the most exciting thing is that the party has a City Girls doll theme. All of the guests are bringing their dolls with them n n But then Deirdres City Girls doll -- Hollywood Heather -- goes missing. Is her sleepover ruined? Or is there a detective in the room who can make sense of this mystery?n