The book starts off with a seemingly novel premise, but it rapidly becomes clear this is just a bait and switch to get marginal skeptics to read a bunch of staid New-Agey clap-trap by putting a cute, intellectual seeming twist on the underlying assumptions. Perhaps the author really takes it seriously, but it just comes off as a lame excuse.
The level of discourse is rather unsophisticated ("gee whiz, I read about this and that and realized it was pretty neat, and you should try it, too, but be careful 'cause it's REAL"), which might be forgiven if it didn't crank the pretension dial to eleven by including the word postmodern in the damned title, and then simply devolve into a laundry list of quotidian popular magic tropes divorced from their [supposedly] traditional contexts. The usual suspects of the Golden Dawn Lite crowd are all here; but Dunn treats these magical artifacts, beings, and practices so superficially that it reads like an outline or digest in places, and he doesn't bother to actually link them with the presumed thesis of the book, but somehow still manages to neuter them with its background radiation. It might be better titled A Survey of Magick for those Without the Stomach for It.
The book has nothing to do with information theory or the sociology of technology, virtually nothing to do with postmodernism, but crucially nothing to do with serious occultism, religious practice, or practical philosophy or psychology. This is more like a LARP handbook than a guide to genuine ritual. It is pure saccharine consumer spirituality cloaked in the dreary self-effacement of a bankrupt academic fashion. What could go wrong? It is like the Spice Girls wandered around the moors looking for fairy folk and then inadvertently gave them pox blankets. Even if you believe that there is something redeeming to the theory or the techniques, this book is woefully inadequate as thesis, apologia, or guide. Those disposed to this sort of thing would be better served by going to the source documents from which the author paraphrases most of his content.