Book 4 in the John Cardinal series In this highly anticipated fourth book from the spine-chilling John Cardinal series, Detective Cardinal confronts his most personal case yet. After years of battling depression, his wife, Catherine, is dead, and despite a suicide note written in her handwriting, Cardinal refuses to believe that she has really killed herself. Hateful notes taunting him about Catherine arrive by mail and he begins to suspect her death was an act of revenge. Cardinal is forced to work this case alone, and his investigation leads him towards a new and very different kind of criminal. One who is truly untouchable by any legal system.