This is the second book in the Tracers series I've read, and I liked it okay, but the gun fights were a lot hotter than the sex.
Just about all these books have the same plot. A tough, sexy, headstrong single girl is menaced by baddies who are part of some evil plot. A tough lawman tries to protect the girl but she's determined to help solve the mystery. They end up falling in love and the bad guys get killed off.
What makes Laura Griffin's books consistently rewarding is that she really does a lot of research on police methods, crime labs, forensic evidence, and gunfire. There were gun fights and weapons practice in this book so realistic and powerful they could have come out of a novel by Stephen Hunter.
The thing is, though, Jonah and Sophie just didn't make much of an impression on me as a couple. She was sort of vaguely afraid of commitment, I guess, but I wasn't clear on why. And he was reluctant to hook up with a crime witness for about 100 pages or so, but there were no real career consequences or even any knowing looks from fellow cops after they started doing it. In fact, at one point he asks a buddy to "lock her up" to keep Sophie safe, and she panics and hits the other cop, and gets locked up over night -- but none of that seems to have any real world consequences on a professional level for either of them.
Another problem was with the villains. (This could be a spoiler, sort of.) Both of them are apparently Iraq war veterans who've turned bad and become crazed killers. There's no reason that couldn't happen, of course, but the author wastes no time trying to understand them. I wanted Laura Griffin or Sophie or Jonah or someone to have some kind of emotional reaction or make some kind of comment on what it all means. Given that every single male and most females in these Tracers books are law enforcement, it's odd that the villains are often military as well.
Overall though I would call this a better than average read. I liked the implied secondary romance with Alison and what's his name, whoever she was working with. Alison struck me as a much more believable professional woman than Sophie. I'm definitely going to look for TWISTED, the next book in the series.