Agatha Raisin and a Spoonful of Poison (Agatha Raisin 19)

Agatha Raisin's detective agency has become so successful that she decides to take time off for rest and relaxation. But with too much time on her hands, it doesn't take much for the vicar of a nearby village to persuade her to help publicize the church fete but there's more going on than innocent village fun. Several of the offerings in the jam-tasting booth turn out to be poisoned and the festive entertainment becomes the scene of two murders. Agatha must lift the lid on the jam tampering and root out the nasty secrets lurking in the village.