This is the first in a trilogy written by a Spanish author. It is a dark thriller that follows a disgraced cop & a genius woman who work behind the scenes to solve crimes. It has been compared to the books by Stieg Larsson and it also reminded of me Pierre Lemaitre's work. Not only are the characters fascinating, the author has added thought provoking morality issues to the plot. I really enjoyed it & will be adding the rest to my TBR list. 4.25/5