For all the novel's clever, contrived construction, and its concern with issues of wider relevance than for this Irish backwater town in the 1870s, I couldn't care tuppence for any of the characters, nor about the dispute over the authority of the Catholic church that drives the plot.
Events concern Father Lannigan, an obstinate, independent-minded priest who refuses to surrender to a Church order to give up his living. His defiance at first divides the town and eventually drives away all his followers except for Nicholas Scully, a young man who has abandoned thoughts of the priesthood and remains loyal to Lannigan more from pity than piety.
The townspeople's hostility toward the priest is fanned by a jealous, drunken curate and leads to riot when Lannigan tries to hold a rally. Kilroy vividly describes how the platform on which he and Nicholas are standing is lifted up and swung around, knocking the latter senseless.
So even that central event is only half glimpsed and much of the action is described at a distance of space - as through the telescope of the wealthy amateur scientist Butler who observes the disturbances from his estate through a telescope - or of time, in recollections or in a rather heavy-handed way of setting up the future, "the whispered half-stories of the terrible events" to come.
The effect, perhaps deliberately, is to create a detachment of feeling about those involved - particularly the priest himself who seems a fleeting figure in all this - and less intentionally to diminish the impact of the actual events when they come to pass.
I felt the author might have more profitably promoted the sub-plot of the courtship and marriage of Emerine (the adopted daughter, not the father as in the Goodreads summary above) and the boy Marcus Scully, subordinating the clerical dispute to the background. This remains undeveloped apart from the hints about their true family relationship. A two-page chronology at the end of the book describing what happens to her in the five years after its conclusion seems to offer more fertile territory for exploration than we have had here.
Bookend: While it's laudable that Faber should reprint worthwhile but neglected titles for this series, it's a pity the design is so unattractive and the higher gsm pages and sharp cover make it uncomfortable to read.