I wanted to like this book more and rate it higher, but since (like many other people) I thought I was reading the first book in a new series and didn't always know what was going on for about the first 1/3, I can only give it 3 stars. Also, I can't really figure out (based on real world events) why these guys decided on Argentina for their base. Yes, it's a cool country, but so not top of the news cycle. And if that was going to be where we were, I'd like more atmosphere - basically we could have been anywhere because there was no interesting food, music, locations, etc. Most of the book took place in random back rooms. The country house where Dr. Juliana lived could have been basically anywhere also. 
 Gabe did have a really sad backstory, but since I hadn't read the previous book, I didn't know what his issue was for a long time. He just seemed like your basic alpha jerk. I saw no reason for Jenna to be attracted to him over any of the other guys on the team. And him pretending that he was doing it all for the money was just laughable. 
 I liked Jenna's smart mouth and it seemed like at first that she was going to give him a run for his money, then she fell into that typical, "I'll just love him no matter how stupid he is and how much he rejects me" thing that so many heroines do and I stopped rooting for her as much. 
 The ending was good when Gabe had to deal with the consequences of him being sure he's the only person who could do anything. But the last chapter went by quickly and characters from previous books rushed in again, so it didn't feel like this couple got their own ending.