First of all, let me say that I am an idiot because I thought this was the first book of the Giordano Bruno's series, but it turned out to be the 3rd- My mistake. In any case, it's written in a way that, whenever they mention something (which I suppose) comes from the previous episodes, they always say something to keep you in the loop.
Talking about the novel itself, although the author's historical knowledge is beyond doubt, I feel that the novel could use some hints or further digressions into the historical moment for the reader to get a better introduction to the setting. As a comparison, C. J. Sansom in my opinion is way more capable of introducing facts without weighing the reading down.
Overall is a pleasant reading, quite tense in some parts, but in several occasions the author seems to eager to go for the dramatic and I just don't find that too appealing in a novel.