Invisible Murder (Nina Borg Series #2)

The second installment in the bestselling Danish crime series starring Red Cross nurse Nina Borg, following Fall 2011's New York Times–bestselling The Boy in the Suitcase
 
In the ruins of an abandoned Soviet military hospital in northern Hungary, two impoverished Roma boys are scavenging for old supplies or weapons they could sell on the black market when they find more than they ever anticipated. The resulting chain of events threatens to blow the lives of a frighten…