About the book: 2021 / Nancy and her two best friends, Georgie and Bess, are full of impatience! Deirdre invited them to a sleepover. There will be pizza, cake and even a pajama fashion show. And most importantly, the party is dedicated to the “City Girls”, the coolest dolls in the world. All those invited will bring their “girl”, and it will be a lot of fun! But the next morning it turns out that Deirdre’s doll is missing... Was it really stolen? Young detectives must shed light on a mysterious disappearance!