Most of the book is set in the present, with frequent flashbacks to explain Cane Canessa's career fighting the terrorists. And most of the present-day is the ex-cop's private search for the reasons behind his brother's death. The investigation is an interesting tour through the Italian justice system, and the story has lots of intrigue and a good bit of shooting. Overall the book is a satisfying introduction to what has become a series featuring perrone, though I have a couple of reservations. The first thing is that young women seem always to be compellingly attracted sexually to the old men ocupying most of the key roles in the story. Some of the wome of the women clearly have financial motives, a few have professional motives, but especially in Canessa's case, young (much younger than him) women are throwing themselves at him in a way that stretches credibility and also reinforces what is altogether a limited sccope of action for the women in the book. Canessa also possesses superhuman powers, it seems, when people are trying to kill him (in a shower of fire from AK47s, for example), but that's just a quibble.
So I would recommend the book for a glimpse into a segment of Italian history, but I would hope for some more realistic and sympathetic female characters in the sequels.