A dissection scalpel Icelandic society, trapped in his conscience and his official humanism. Racism, prejudice, false testimonies, nothing is spared Erlendur and his deputies loyal to delay the search (or) culprit (s) of the unexplained murder of a boy of twelve. The mother of the teenager from Thailand and his father, Icelandic pure strain, belong to two communities who suspect each other and do not attend, even within the school. The false leads accumulate throughout this difficult investigation, with many social and psychological interconnections, which will bring the Commissioner Erlendur face his own past. A very dark thriller, in the vein of previous novels Arnaldur Indridasson, with a final coup de theater that leaves no guess. But "Arctic Winter", by the fineness of his social analysis demonstrates once more to those who do are not yet convinced that the detective story is the most faithful mirror of society.