Good story so far. If i was to suggest something it would be making keiran have more active choice in what he does. At least before the last mission most of the events were happening to him not because of choices he made. Not that he's a bad character but when a character is passive throughout the book it becomes less about them and their choices and more about how things just happen to them. But this is just from personal observation of various novels and writing. Story is pretty solid. I just caught up after starting to read it yesterday.