Can you help Blue find her friend's spooky hiding places? Under every flap is a great Halloween costume surprise! By the time the party starts, Blue has found all of her friends -- except one. Where should she look next? Note to Parents from Creators This book invites children to play an interactive game of hide-and-seek with the Blue's Clues characters. Blue's friends have hidden throughout this book, and readers will feel empowered as they enter each room and figure out the visual hints which lead to the characters' hiding places. These activities help children learn specific skills such as predicting, making associations,and problem solving.