While it is an entertaining read, and the core concept of a brilliant tech genius creating horrific violence after his death is gripping and plausible, as it progresses it becomes less and less 'believable' as the story escalates into situations that are more outlandish.

None-the-less, it fits into the category of books including Devon Stack's 'Day of the Rope', Chuck Palahniuk's 'Fight Club', and Michael Crichton's 'Terminal Man', in which initially plausible and believable scenarios lead to very exciting, but less believable results.

I'm not knocking it, it's a great book. The premise is believable and terrifying, a genius game developer with grudges to burn unleashes a series of daemons set to trigger events after his own death. It's frightening because, although the more outlandish stuff would be hard for even millionaire geniuses to pull off, like predicting how specific people will react to an incident and creating if-then chains based on anticipated behaviour, it's all technically possible.