Adopting a solid, albeit slightly snarky, scholarly tone, Matthews makes a deft analysis of the modern/LaVeyan satanist movement, cutting through the many layers of falsehood and self-aggrandizement upon which the movement is founded. In argument, he leans a little too heavily on the liberal democratic consensus for my tastes, and spends probably too much time engaging in philosophical debate with fascism, but the book overall does a good job of accomplishing its main purpose of illustrating the extent to which the libertarian trappings of the movement are a cover for an intellectually bankrupt social Darwinist worldview.
As an aside, the book is extremely 2009, for better or for worse. On the lighter side of things, there are many now somewhat comical references to Myspace as the premier social media network; more seriously, the book is interesting in light of the political developments of the 13 years since its publication, though I'd hardly call its subjects the direct precursors of anything substantial today.