This work has some bright spots, mostly plotting in the second half. Other strong points are the character development of the O'Malley family members. The author does a good job of introducing the cast without belaboring the story (which is focused on Kate). Also, the author demonstrates knowledge of the police/ FBI etc. structure and procedures. There were so many reasons I WANTED to like this book.
However, there are significant weaknesses here. The most blatant of which is that Kate is supposed to be speaking with a southern accent, and Dave is supposed to be speaking with a British accent. Henderson needs to realize that word choice, tempo and enunciation are also part of accent, not just merely telling the reader they are speaking differently.
Wooden dialogue, incomplete setting of scenes (pretty problematic in a book dealing with crime), repetition of the same words within a page, and confusion about the timing of a significant incident (starts off Mon, then people start talking about "what happened on Tuesday, and finally in the last part of the book, it is a "Thursday!") all contribute to a convoluted reading experience. I had to read some parts a couple of times before I could go on.
Finally, the author is just a little bit too much in love with her characters. All the O'Malleys are flawless, gifted, top of their profession people. Numerous times, their paths in negotiator, fireman, US marshall, doctor, counselor, cross. This lack of realism may have been forgiven were it not for the final incident in which "boyfriend" is allowed into a negotiation. I don't care if he works for the FBI and has a strong personal interest in protecting the negotiator (whose reasons for being there were also thin, but plausible). I highly doubt such a situation would be permitted in real life.
Certainly these blunders are the fault of the author, yet one wonders, "where are the editors"? A rigorous editorial process/ review should have been able to address many of the flaws. Of course, maybe a rigorous review did take place? In that case, one wonders if the effort to pull a good final product from the author is worth the publisher's resources. While the content has promise, I would be embarrassed to publish this book in it's current form.
I have two other books in this series from the library. Whether or not I will be able to overcome this first installment remains to be seen... After thinking about this for about 1/2 hour while perusing Goodreads, I have decided "no", I'm not going to read anymore of this series. There are so many BRILLIANT books I would rather enjoy.