Marsons, Angela. D.I. Kim Stone novels

Originally published: Bookouture, 2015

The greater the Evil, the more deadly the game ... When a rapist is found mutilated in a brutal stabbing, Detective Kim Stone and her team are called in to bring a swift resolution. But as further disturbing events come to light, it soon becomes clear that there is someone even more sinister at work. With the investigation gathering momentum, whilst also trying to expose the secrets of a sick paedophile ring, Kim finds herself in the sights of a lethal individual undertaking their own twisted experiment. Pitted against a dangerous sociopath who seems to know her every weakness, for Detective Stone, each move she makes could be deadly. As the body count starts to mount, Kim will have to dig deeper than ever before to stop the killing. And this time - it's personal