The Girl of His Dreams by Donna Leon
When a friend of Commissario Guido Brunetti’s brother, a priest recently returned from years of missionary work in Africa, calls on him with a request, Brunetti suspects the man has hidden motives. An American-style Christian group has begun meeting in private homes in the city, and it’s possible the priest is merely wary of the competition. Nevertheless, Brunetti and his wife, Paola, decide to go undercover. But when a girl’s body is found floating in a canal, Brunetti must put everything aside to investigate the secretive world her people, the gypsies, who exist on the fringes of Italian society. Originally published in 2008, Donna Leon’s The Girl of His Dreams is classic Donna Leon.