I Am Half-Sick of Shadows- Alan Bradley

All is not well at Buckshaw, home of Flavia de Luce...

With the family finances in a parlous state, Flavia's father has rented Buckshaw to a film company for a location shooting. When a heavy snowfall cuts the village off, the actors are talked into staging a benefit performance in the parish hall. But old jealousies surface, and the leading lady is murdered. Flavia, who has been enlisted to help out behind the scenes, finds herself up to her knees in snow - and murder!