Mein Escape-Adventskalender: Fahrschein ins Ungewisse (2021)

The Christmas holidays have finally begun and you're taking the train home to spend the festive season with your family. But something is wrong with this express ... Why are all the compartment doors suddenly locked and where have all the other passengers gone? What's going on here? In this interactive Advent calendar book with separable pages, exciting puzzles, encrypted codes and hidden clues await you every day to help you progress through the story. With the red decoder foil, you can uncover hidden clues and follow new leads. —description from the publisher