I really enjoyed this book.  The villain was very disturbing and I really felt for the victims and their families.  It made me question what the definition of law enforcement's mantra of "doing our best".  If I was a parent of a missing child, and knowing the horrible things that may happen to them in the hands of their captor, I would expect the people working on the case to be working non-stop 24/7.  Of course, that's not realistic.  I felt for Steven too, his conflict with the responsibilities of his work and his family but was often quite frustrated at him as I felt that at times he wasn't doing enough, especially when he was distracted with Jenna.