The Wanderer by Michael Ridpath is a diverting mystery set in Iceland. Magnus, the lead detective, is a distinctive character in that he is Icelandic but was raised in the USA. He is back on the island permanently just in time to puzzle out the murder of a young Italian tourist. There is a fascinating archeological backstory involving the Vikings and the length of their exploratory journeys. There is any number of suspects and plenty of atmosphere in these unique police procedural.