Scooby-Doo and his friends from Mystery, Inc. have been especially good this year. So as a special treat, Santa's invited them to visit him at the North Pole! Scooby, Shaggy, Fred, Velma and Daphne can't wait to meet the one and only Santa Claus. But when someone steals Santa's magic sack of gifts, it looks like there's a mystery to solve! Now Scooby and the gang are sniffin' for clues inside Santa's bake shop. Can they track down the thief before Christmas? It's up to Scooby-Doo - and you! Follow the scratch-n-sniff clues on the stickers (unused) inside this book, and help the Mystery, Inc. gang crack the case!