Arctic Chill by Arnaldur Indridason

A boy is found dead, frozen to the ground in his own blood. Detective Erlendur and his team identify the boy, Elli, who is half Thai, half Icelandic. Elli's older brother, Niran, is also missing, and the police hope that something terrible hasn't happened to him, too. Because of Elli's background, the authorities wonder if the murder might be racially motivated. Erlendur, Sigurdur Oli and Elinborg interview all the people Elli and his family come in contact with--neighbors, teachers and other students--in order to find his killer. For readers who enjoy police procedurals.