The Extremes deals with the emotional aftermath of a Hungerford-style mass killing spree and the curious linkage that seems to exist between it and a similar atrocity in the USA. While the story of a bereaved American widow searching for some kind of closure in a dismal British town is affecting, what transforms The Extremes into something much more exotic is Priest's additional science fiction element of virtual reality to blur the boundaries between fantasy and reality. While Priest's depiction of his world is unconvincing in logical terms (on the one hand Bulverton is painted as a decaying resort town, yet for some reason has a popular state of the art virtual reality centre nearby), it makes for a fantastic dreamlike climax where the nature of reality itself is unsure, particularly when the novel starts breaking down into a fractal pattern, as characters already within virtual reality then enter other virtual realities within. Anyone looking for a standard thriller with a standard final explanation will be disappointed - but anyone looking for a bizarre dreamlike science fiction novel where the technology is of less importance than the characters and prose will love it.