I am Nemein. I am not a murderer. I am emotionally detached from my killings. I am, therefore, an instrument of Nemesis, a punisher.

This is a theme running through a number of blogs on the Dark Web, pulling Inspector Sheehan and his team into a gritty underground cyber world they'd barely heard about.

This cold-blooded, narcissistic psychopath frustrates the best efforts of the Serious Crimes Unit on the hunt to find him, using intellectual and philosophical argument to justify a series of gruesome murders. Sheehan and his team rush headlong down a series of blind alleys in pursuit of the serial killer.

As the investigation gradually finds some direction, the psychopath's blogs begin to fill with dire threats against the team — and Sheehan's wife. Sheehan's famed intuition is tested to the limit but when the truth finally comes out, he is faced with an impossible decision. Can he save his colleagues and his wife before it's too late?

Murder on the Dark Web has received the Top Medal Honours Award from the New Apple Awards for Excellence.