This is a difficult book to read because it is suffused with academic references and needlessly complex phrases and jargon. For example, "... a more lattitudinarian position verging even upon antinomianism." (p.84), "... the Manchester school of social antrhopology, and such French semiologists Roland Barthes." (p.78), "These are meant as Weberian ideal-types ..." (p.59). In short, the book targets an academic audience, IMO - not a lay audience.
The author deconstructs speeches of George Bush and Osama bin Laden. The author tries to show that both Bush and bin Laden use the same essential religious themes and rhetorical devices to motivate and sway their target audiences ("Symmetric Dualisms"). IMO, this is sophistry; the same analytical technique could be applied to, say, Churchill and Hitler or Lincoln and Jefferson Davis.
The primary redeeming qualities of the book are brief treatments of Sayyid Qutb and Mohammad Atta, and an even briefer treatment of the insanity following the French Revolution (e.g., "The Cult of Reason").
For the layperson, instead of this book I recommend Terror in the Mind of God: The Global Rise of Religious Violence, 3rd Edition (Comparative Studies in Religion and Society, Vol. 13) by Mark Juergensmeyer. It is far more accessible, and IMO, it provides a much more useful analysis and a broader survey. If you're looking to learn more about Sayyid Qutb and his influence on Islamic radicals, turn to Terror and Liberalism by Paul Berman.