I found this book to be slow starting. It took me around ⅓ of the book to start to be invested in the story. 
While I don't think things were rushed, I do think this could have been a little longer to flesh out the characters and story more. 
Certain things I felt there wasn't enough build up too. How Viridiana character growth happened. How she seemingly quickly switched personality. I would have liked to see more of the change in her. 
I felt like parts of the story were missing in a way. While yes the story is complete I just wanted more build in areas. 
While I did enjoy this, I wish some things weren't so easy to figure out. Especially who the bad guys were. Which maybe the point was to have them so obvious but guessing the truth so easily lowered my enjoyment a little. 

I do hope Silvia writes more thrillers in the future as their was so much potential here.