A dad and child went exploring … (Photo by Sigurdur Svansson) Horse play (Photo by Sigurdur Svansson) Hjálparfoss (Photo by Sigurdur Svansson)

With a population of just 323,000 it can be easy to see Iceland as quaint, but the Scandinavian country is a world away from Hercule Poirot and Miss Marple. Yet it was their creator, Agatha Christie, who had such an effect on one Icelandic teenager, Ragnar Jonasson, that he went on to write his own best-selling murder...