To Each His Own by Leonardo Sciascia

"To Each His Own" is a mystery novel that follows a professor in a small Sicilian town who becomes obsessed with solving a double murder after receiving an anonymous letter. As he delves deeper into the investigation, he uncovers a web of corruption and deceit that reaches to the highest levels of power in his town. Despite his best efforts to bring the truth to light, he finds himself in danger as those involved in the murders will stop at nothing to keep their secrets hidden.