I enjoyed your review "pistol" Pete.
The only other book I found even more tense is The Dark Sacrament by by David M.Kiely and Christina McKenna.
Most people slag the - The Dark Sacrament - off as complete fiction.
SPOILER ALERT - In that book a ten year old boy sees someone called Michael fight a powerful demon. The boy who seldom attended church observes that "Michael" has a 10 foot sword and pushes the demon into the heath under the fire.
This young boy is not a regular church goer. The priest in order to ensure that the 10 year old has not been coached takes the boy to a "non-denominal church." The boy correctly picks out the Archangel Michael.