If you had to choose a new location for a crime series, where would you look? Michael Ridpath had to do just that. He chose Iceland, a country of fjords, glaciers and volcanoes, of long, manic summer days and long, sinister winter evenings, a place where everyone is on Facebook and everyone's grandmother has spoken to an elf. This is his account of researching the country: the breathtaking landscape, its vigorous...