Murder by Suicide — Veronica Heley

Just as Ellie Quicke is beginning to come to terms with life as a widow, malicious letters start to spread through the parish. The much-loved vicar and the rather feeble organist, Nora, are the first targets. Soon chaos is reigning in the parish and Ellie is called on to help.

But the messages keep on coming, and now the targets include Ellie herself. Perhaps there is more than one crafty hand at work? As one victim is tragically driven to suicide Ellie discovers that the poison spread by the letters can be fatal to anyone who receives them...