To Each His Own (Italian title: A ciascuno il suo) is a 1966 detective novel by Leonardo Sciascia in which an introverted academic (Professor Laurana), in attempting to solve a double-homicide, is murdered for his naive interference in town politics.
The novel opens when Dr. Manno, the town pharmacist, receives an anonymous letter made up of newspaper cuttings. The letter contains a death threat, but is dismissed by the locals as a practical joke. However, when Dr. Manno and his hunting companion, Dr. Roscio, are found murdered the next day, it becomes quite apparent that the letter was intended to do more than simply frighten the pharmacist from engaging in his favorite pastime.
Although the double-homicide is interesting gossip for the townspeople, nobody gives the motives for the murders a second thought, and it is assumed that the pharmacist would have known the reason for his murder and would have thus deserved the consequences. Everybody in the town continues with their daily lives after a short lapse of time apart from Professor Laurana.
When Dr. Manno initially received the letter, Laurana notices the word “UNICUIQUE” and proudly believes himself to be the only person with the knowledge to solve the case. For months Laurana follows various leads, and before long finds himself entangled in a web of corruption from which he cannot escape. Prof. Laurana is soon regarded to be a threat by the perpetrators of the crime, and it does not take long before he too is murdered.