Emery, Anne. Cecilian Vespers.
Set in Halifax, Nova Scotia, the novel is the fourth to feature lawyer Monty Collins and his friend Fr. Brennan Burke. Father Burke is the head of a school for traditional church music, the Schola Cantorum Sancta Bernadetta, and the students include both church and lay participants, not all of whom are in favor of tradition. When a well-known German monk is murdered, there are plenty of suspects who either have no alibi or give misleading information.
Although another monk confesses, Monty and Fr. Burke believe the confession to be false and must continue their investigation.
What is most interesting about this mystery is all the information about Vatican II, the subsequent changes in Church positions and policies, and the often intense feelings that remain on both sides of that aisle. Not being Catholic, I found the information about Vatican II fascinating and informative.
I've not read any of the previous novels featuring Monty Collins and Father Burke so I don't know how this one compares, but several complication from the previous novels appear to thread their way through this one.
Fiction. Mystery. 2009. 300 pages.