By the Time You Read This by Giles Blunt

In Algonquin Bay, Ontario, police detective John Cardinal is devastated when his wife, Catherine, takes her own life. Soon, he gets letters taunting him in his grief. Cardinal starts to believe that maybe his wife was murdered and begins investigating her death even though his colleagues have decided on a verdict of suicide. Fellow cop, Lise Delorme, meanwhile, has been contacted by the Toronto Sex Crimes Unit to help them on a case of child pornography that they believe is occurring in Algonquin Bay. Soon, the investigations go in an shocking direction. Blunt writes a harder edged mystery series (this is the fourth) that should be wider known. Great cover...