Lights, Camera, Action -- n Geronimo Stilton goes Hollywood as he tires to solve a new mystery surrounding n the production of Block Cheddar 4! n n Geronimo Stilton is getting n into the movies when he is invited by an old filmmaker friend, director E.J. n Sprocket, to visit the set of Block Cheddar 4, starring Jack Vole. Convinced n that this could make for an interesting article he brings Thea, Benjamin, and n Pandora along. But soon, they discover that it's not all glitz and glamour as n strange happenings have been plaguing production causing the film to go off n course.

Will Geronimo's acting career be over before it starts? Is there a MOLE n on the set? As E.J. would say, That's show business for ya, n baby! n