If you like Stieg Larsson’s Millenium Trilogy (The Girl With The Dragon Tattoo, The Girl Who Played With Fire, The Girl Who Kicked the Hornet’s Nest), you might enjoy these Scandinavian Crime Fiction titles:

The Snowman by Jo Nesbo

Oslo detective Harry Hole is tracking a serial killer who leaves snowmen at murder scenes. Hole’s new young colleague believes there is a link between the crimes and a long-missing cop from her town.  
Originally published in Norwegian in 2007. Violence, strong language, and some explicit descriptions of sex. Bestseller. 2010.            

Troubled Man: A Kurt Wallander Mystery by Henning Mankel

As aging chief inspector Wallander’s forgetfulness gets him into trouble at work, his daughter Linda has a baby with her lover Hans.  When the baby’s ex-military grandfather goes missing, Hans asks  Wallander to investigate. Then Hans’ mother disappears, too.  Originally published in Sweden in 2009. Some violence. Bestseller.

Quiet Girl by Peter Hoeg

Denmark. Kasper Krone, a circus clown and music instructor facing extradition for tax evasion, discovers that his former student KlaraMaria has been kidnapped. Kasper sets out to rescue her and others from sinister businessmen seeking to exploit their psychic abilities. Translated from Danish by Nadia  Christensen. Some violence.