The Villain's Den - Detective Harry Sweet, #3

A serial killer is on the loose in Boston.  In this most intriguing third book of the Harry Sweet series, Harry has left the Boston Police Department and no one, including Private Investigator Shane McCurdy, seems to know where he's gone.  When Shane's daughters' best friend, Margot O'Neill, turns up as the serial killer's latest victim, Shane knows he needs Harry's help to solve the case.  Will Harry and Shane be able to work together to bring Margot's killer to justice? By the end, the chase for the killer will be the biggest personal and professional challenge of their lives.  Will anyone survive The Villain's Den?