This embarrasingly adolescent book has absolutely no redeeming virtues, and I would recomend fans of the genre to look elsewhere: to James Patterson, Martin Cruz Smith, or Patricia Cornwell.
Although the book is supposed to be set in Washington, DC, the city is unrecognizable. Compared to Patterson, who salts his Alex Cross books with details that reflect knowledge of and affection for the city, Coulter seems to have never visited DC, or even bothered looking at a map of the city.
Worse, her characters are disconnected from the world the rest of us live in. One of the two main characters openly engages in what can only be called sexual harrassment towards the other main character, but the other characters watch this with approval, as does Coulter herself.
Naming this new organization within the FBI the "Criminal Apprehension Unit" is another example of Coulter's laziness. What, exactly, does she think the rest of the FBI does, if not apprehend criminals? Another lazy shortcut is the "magic computer" that is the chief investigative asset of this "Criminal Apprehension Unit". While computers are indispensible to the modern investigator, Coulter doesn't bother including them in ways that make sense. She pays no attention to their real capabilities.
In short, this book is terrible, with amateurish style, unbelievable characters, and a ridiculous plot. Don't waste your time.