Amazon.com description: Product Description: Detective Martin Murphy investigates when someone starts to kill the killers--who happen to have been under the surveillance of Confront, a support group for relatives of murder victims...Suspecting the group of revenge killings, Murphy goes undercover and joins them. But Confront are one step ahead and the group is forcing him to face his own harrowing history...Now Murphy must come to terms with the past and bring the killers' killer to justice. The problem is he's starting to think that the killer may have a point. After all, revenge is sweet...isn't it?