These books remind me of episodes of Supernatural. You've got the oh so serious young professor priest, and the hardened, old, hateful priest who takes no crap and is not interested in being proper. The reluctant professor is forced into a partnership of investigating and then dealing with supernatural issues that are foretold to the Vatican by a blind monk who had visions that are interpreted by nuns. There's conflict, humor, a bit of spooky supernatural stuff, and an unlikely pairing that works somehow. These books are fun reads that are short and don't take themselves too seriously. The Kindle version, at least, isn't always great with the translations, but if you can overlook them, they're well worth the read.