When I started reading the first book I was intrigued by the historical references. I like good historical fiction books, even though the Bravo Shaw series isn't exactly one, however, there are good historical anchors.
I found the second book of the series more fluid in the narrative, less distracting with unnecessary details and long digressions. There are more cliffhangers at the end of the chapters that keep you wanting to know more. All in all, I believe it's a good thriller and it connects nicely with the first book of the series, in this case, we don't have much of contraposition between the order of the Observantines and the Knights of St. Clement but more a fight of Good vs. Evil.
I can say that I'm hooked, and I think this was the intent of the author all along. I feel like wanting to binge read the whole 4 books like I would with a good Netflix series. I'll start reading the 3rd of the series soon.