Sunday Silence

Nicci French is the pseudonym of Nicci Gerard and Sean French, a husband and wife writing team from Suffolk England.  This  is their seventh Frieda Klein novel and follows Dark Saturday.  Frieda is a psychologist and resides in London where she has a strong group of friends whom she considers her family and she often gets involved in helping the police with murder cases.  Since the beginning she has been literally haunted by a murderer named Dean Reeve.  Dean is supposedly dead, but Frieda believes he is still alive and is aware of her every move.  He has committed arson and murder against her enemies and to stop her from searching for him.
This novel begins with the murder of a private detective she had hired to find Dean Reeve.  He must have gotten close, because Dean killed him and buried the body under her floorboards in her home.  Shortly thereafter, her niece is kidnapped, drugged and held for a weekend in an unknown place, and then her friend, Ruben is beaten almost to death.  She blames Dean Reeve for these incidents.  When her friend Josef's son is briefly kidnapped and then returned unharmed, he repeats several times to Frieda "This is me look somewhere else".  She finally realizes, this is a message from Dean and he is saying he is not responsible for the the kidnapping of her niece or the beating of Ruben.  This can only mean that a copycat is involved.
A new detective is assigned to the case but fails to find the perpetrator.  Frieda must do what she can to protect her friends and family.  This was supposed to be the end of the series, where she deals with Dean Reeve.  Cleverly the writers instead send her on a quest to find a copycat who is as ruthless and murderous as the murderer he is enthralled with.