The Chestnut Man, by Soren SveistrupRead about the other entries on the list.
Scandinavian thriller fans, meet: the Chestnut Man. In Copenhagen, he is killing seemingly at whim, leaving behind tokens of his villainy in the form of dolls made of matchsticks and chestnuts. When fingerprints are found on one of the dolls, a team of detectives with an axe to grind must team up and find the killer. What you think is a straight procedural murder mystery is full of layers and depth—with a female detective at the helm, and an ending that will almost shock the life out of you.
--Marshal Zeringue