Il terzo segreto

Montalbano receives a letter informing him of the accidental death of a worker at a construction site - posted before the man died. It turns out to be the latest in a series of similar "accidents", but he must act unofficially as the case is under the jurisdiction of the Carabinieri. Also, after someone shot at the noticeboard containing announcements of upcoming weddings, he must find out who is trying to prevent a marriage and why.