Not my favorite book of the series, nor my least favorite, but certainly a fitting end to their story. 
 Burns stole a lot of money from the Vega cartel, and now everyone is after it, and after Ty and Zane because the CIA, the NIA, and the cartel all think they have it (or can get it). Ty and Zane will go down for murder and embezzlement, respectively, due to Burns shady dealings, and no one cares to help them out of that jam (though at least the CIA is willing to cut a deal IF Ty and Zane bring them the money). 
 So, it's Zane, Ty, Sidewinder, Liam Bell, Julian Cross, and Preston (who now works for the CIA instead of Julian) against the world. The odds are stacked against them getting away from the cartel and the NIA alive, but they're going to try. 
 And can I just say that Chester Grady is a scary SOB? Holy cow. 
 If I had any weirdness with the story-telling, it was some of the jumps from scene to scene. The time gaps weren't quite linear, so there were a couple of points where it was like a TV show that starts with a sticky situation and then says "Two hours earlier" and then gives us the backstory we missed. I don't recall this construct in the other stories, but to be honest, I haven't reread them from the first time, so maybe I'm just wrong and it poked at me strangely this time for some reason. (It's not like it really affected my star rating, though I might give it a 4.5 stars, rounded up for rereadability.) 
 I'll definitely have to go back and reread their story all the way through some day. But I'm betting on there being some one-off short stories here and there about Ty and Zane breaking in some rookies (which might even possibly lead to a new series with new MCs in the same universe).