There's so much family involved in this book that it's a natural for the reader to relate.On one hand, you have Joe Gunther's family threatened for hi actions in a preious case. On the other hand, you have a series of murders in which it's easy to root for the murderer. The victims are internet predatorsI very much liked the use of chat room conversations prefacing the early chapters. These should be required reading especially for teen girls and their parents because this has become a part of real life.As in many contemporary mysteries, emphasis is put on all types of inter-personal relationships. In this case, this element definitely adds to the suspense and reader involvement. This is the second Joe Gunther novel I've read, and it sure is working to make me as much a fan of Archer Mayor's books as I have been of Michael Connelly's.This is a must read both as a mystery thriller and as a cautionery novel for teens and their parents.