Even the Darkest Night (Terra Alta)

The first book in the internationally acclaimed series: Melchor, the son of a prostitute, went to prison as a teenager, convicted of working for a Colombian drug cartel. Behind bars, he read a book that changed his life: Les Misérables. Then his mother was murdered. He decided to become a cop.
 
This new case, in Terra Alta, a remote region of rural Catalonia—the murder of a wealthy local man and his wife—will turn Melchor’s life upside down yet again.
 
Even the Darkest Night is a thought-provoking, elegantly constructed thriller about justice, revenge, and, above all, the struggles of a righteous man trying to find his place in a corrupt world.