The basic premise of this book is that in the US a large number of fanatics of mainly Iraqi origin have taken refuge in the US, but have taken up the role of sleeper agents to immerse themselves in American life, later to emerge as terrorists and get revenge for various acts the US has imposed on Iraq. That scenario is sufficiently realistic for fiction. The story revolves around the first such piece of terrorism and the response by US agents, and in particular two main ones and about three slightly lesser ones (in terms of "story-following", not in terms of skill or position). The situations are quite plausible. One reviewer questioned that in a school attack the terrorists did not guard the entrances. Fire regulations mean that large schools have many entrances so the terrorists luring the pupils into the assembly hall is quite a sensible approach. The author has taken the trouble to get a number of details into the book: some Arabic greetings and how Iraqi refugees might behave; the terrorist armaments and a realistic source for how they got them is given. The terrorism scenes are described realistically and with one exception, the action scenes are quite plausible. The characters are reasonably well-described, and given that the author is quite young, this is an excellent start.
The negatives. The writing style at times reflects the author's youth and includes things that the author thinks you need to know (probably based on writing advice that is not appropriate at the time). A mercenary on a suicide mission? Really? Descriptions in action scenes need to be strictly limited to the need of the reader to follow the action; anything else slows the pace. After action scenes, yes, bringing the tension down is great, but it is important not to simply add irrelevancies and in some ways these "down" scenes are the hardest to write, so while the author has the right idea, with more experience these would be written differently. Wilmering lets herself down in the final scene. If you have a prepared ambush, professionals will have a plan on how to execute it. I don't want to spoil, but this scene really is indifferent. It has been done like this, no doubt, to create a "high point", but it would have been much better to do something else. As an aside, in a gunfight you don't stop to tend to the wounded; you do that after the enemy is neutralised or you are all dead because the enemy do not conveniently stop. These negatives, however, are minor irritants. The story reads quite well and kept me interested even if the end was a little disappointing.