Operation: secret recipe / Geronimo Stilton ; illustrations by Danilo Loizedda (design), Valeria Cairoli (pencils and inks), and Daria Cerchi and Serena Gianoli (color) ; translated by Julia Heim.
In Milan to attend the unveiling of a parchment that contains the original recipe for a traditional holiday bread, Geronimo Stilton is shocked when a thief posing as him steals the recipe, forcing him to catch the culprit and clear his name.
