The book is quiet good. I was a bit worried in the beginning, as I have tried to read a few similar books, and they all go into weird tangents. Like the hero/heroines love story, some boring back story etc.
But here the author keeps the story tight. The book starts with an attack on a Church compound, that may have been caused by supernatural beings. A man known as the Heretic is called in to investigate, as he has knowledge of the occult, though the other Church members view him with disgust.
The story is non stop then, as the Heretic fears someone in the Church is working with the demonic forces, and he has to stop them before they destroy the Church. The action is good and fast.
The book ends well, and can be read independently, though it is a part of a trilogy.
Recommended if you like urban fantasies, that do not involve mushy romance or glittering vampires. ;)