In the new novel from France’s bestselling crime writer, Inspector Adamsberg investigates a series of strange murders linked to a secretive society

*Featured in The Times top ten crime novels of the decade*;;THE NEW INSPECTOR ADAMSBERG NOVEL;;Shortlisted for the CWA International Dagger 2017;;A woman is found dead in her bath. The murder has been disguised as a suicide and a strange symbol is discovered at the scene.;;Then the symbol is observed near a second victim, who ten years earlier had also taken part in a doomed expedition to Iceland.;;How are these deaths, and rumours of an Icelandic demon, linked to a secretive local society? And what does the mysterious sign mean? Commissaire Adamsberg is about to find out.