This was a good book. 
It had a great idea, it had great characters, very well done writing and i completely loved the parts of the book that took place during the "current times" of 2005, especially once the team got to New Orleans. At that point it really became fast paced and one-the-edge-of-the-seat kind of a read. 

What i didn't love about this book where following things: 
1. that the main character Amaia was 25. But we where to believe that she not only finished University in the US but also that she got a high ranking job in the Police force in Spain. Sure, we are being told that Amaia is very smart and might have skipped a grade or two or even be able to move through Uni faster - BUT lets face it, sadly most jobs that are very much still seen as a male job -such as for example the police- its hard for woman to move up to higher up positons fast. They really have to be over qualified for most jobs to get them in those fields. Its sad but for the most parts thats true. Now i do not know if that is how it works in Spain - it would be fantastic if Spain is actually looking for the most qualified people instead of anything else (such as gender, age or how long they are in that specific place or how good they know other higher ups...) But i am a little bit skeptical about this, even more so since Amaia is quiet often quite blunt and a bit too specific, which is fine. But doesn't really work well in team based workfields and in regards of promotions. 
So adding all that up? I just couldn't believe that someone at the age of 25 managed to get where she is. And i honestly don't understand at all why the author even made her that age. It would have been completely fine to make her at least 10 years older. She would still have been the youngest on the FBI team, she would still have been in an impressive position at that age. 
Why do so many authors feel like they need to make people unbelievably young as if aging over 30 is somehow the end of it all?

Besides the age thing i also did't love: 
2. that we time skipped back and forth between three different things. 
The first of those is of course the "current" story taking place in 2005, an other one is a childhood insight into Amaia and her family history and the third one is an older personal thing of one of the other FBI agents where i am not sure -just hours after finishing the book when that took place again. 
it was a bit much. 
And honestly both the history of Amaia and the thing with the FBI agent weren't really necessary? They didn't really add a huge amount -if anything- to the 2005 case and how it was worked. 
Those things didn't need to be in the book. 
And if those story lines would have been left out? The book wouldn't have been 630 pages but rather around 400-450. And that would have been the perfect length. 

I don't mind learning backstories of characters, i enjoy learning why and how they gotten into their chosen fields or why for example they would rather not do something or chose to stay somewhere -like Spain instead of starting at the FBI- but i also like it more if i don't feel like its only added as a "wow look what they overcome, what they had to deal with!" kind of think instead of actually adding something to the book it is being told to. 

And because it didn't really add anything to the overall story, most of those jump moments really pushed me out of the 2005 suspence of trying to figure out who the killer was and what would happen next. 


But overall?
this book was good. 
It was entertaining, it kept my interest for most parts, it was well written with good characters -as i said. Its good. Its worth a read.