Really a 4.5. Maps would have been helpful. Not a great book to read at bedtime! Definitely makes you look at people and places/surroundings differently.

Very timely - there have been some recent happenings on at least a couple of the cases:

http://www.khou.com/mb/news/crime/who-is-william-reece-insight-into-a-suspected-serial-killer/112797820

http://kfor.com/2016/04/11/man-charged-with-oklahoma-cold-case-murder-leads-investigators-to-more-remains/

http://www.khou.com/mb/news/remains-found-in-se-houston-identified-as-jessica-cain/135457749