This is the 4th book in the Flavia de Luce series. I read the first three when they were translated into Norwegian years ago.
In this book a film crew arrives at Buckshaw to film their next film. The vicar decides that this is the perfect occasion to raise funds for the church roof and have the movie stars participating. When the snow starts falling, it‘s decided to have this at Buckshaw. So when a body is found, there‘s a lot of suspects.