This is the second book by Chris Carter. His debut 'Crucifix Killer' was riveting and set a very high standard. Lots of twists and turns kept you guessing to the end. I was looking forward to his second book but wasn't sure it would/could be as good. Well I was wrong. I loved it, loved it loved it!!!! This book is every bit as good and kept me turning the pages - I read it in two days and felt almost bereft when I finished it. I will need to leave it a few days before I look at another book, because I will almost certainly compare it to this one.
You don't have to have read the previous book to follow the characters - it is a good stand alone book. However, if you don't read the previous one - you has missed a gem.