The pyramid of mud / Andrea Camilleri.

It's been raining for days in Vigata, and the persistent downpours have led to violent floods overtaking Inspector Montalbano's beloved hometown. It is on one of these endless grey days that a man, a Mr Giugiu Nicotra, is found dead, his body discovered in a large water main with a bullet in his back. The investigation is slow and slippery to start with, but when the inspector realizes that every clue he uncovers and every person he interviews is leading to the same place - the world of public spending, and with it, the Mafia - the case begins to pick up pace. But there's one question that keeps playing on Montalbano's mind: in his strange and untimely death, was Giugiu Nicotra trying to tell him something?