Operation : secret recipe
- New York : Scholastic, 2017
- 107 p. : col. ill.
- Geronimo Stilton ; 66 .
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.