Author Shaun Jeffery does an amazing job of setting up red herrings, and taking your mind into places and thoughts that lead you in differing directions. Each time you think you have it figured out, the killer makes another move to create further misdirection. Jeffery's characters are human with both strengths and weaknesses, which draw you in. Easily swayed by the dark side and their friendships, they allow themselves to be manipulated by a copycat crime, but their action puts them at risk in a way they could not have realized. Prosper is a strong protagonist, and yet he still carries the flaws from his youth. While inadvertently being involved trying in a copycat murder case, he is now racing against time to save his friends and family.
The murderer is a disturbed individual, with a mindset out of some of our worst nightmares. His manipulation of the bodies and the way he kills is gruesome, and over the edge. He aligns his clues in such a way that Prosper will take notice, and yet Prosper has no understanding. It is only as he compares notes with his surviving friends that he begins to see a picture of madness. There is no way to prepare for what he discovers.
I would recommend The Kult for the horror and suspense aficionado. It is full of horror and the suspense as you trace the keeps-you-guessing clues. The action is nonstop, and the killings are both brutal and graphic. This is a book better read by daylight; even then it will keep you up with the lights on and the doors locked. Be prepared.