Fire on the Fens

The Fens are burning, and Detective Nikki Galena faces a cat-and-mouse battle with a killer arsonist. Someone is lighting fires. First they target homes and businesses, but then a body is found at one of the crime scenes. More fires are lit. And at each one a single person dies. But the victims have led spotless lives and apparently there's no connection between them. Meanwhile, the town is facing a very peculiar threat from a group of sinister Satanists led by a charismatic businessman. Who is burning with anger, and can Nikki stop them before anyone else dies?