The author works to sell the notion of propaganda as a skill and service, inventing what is best described as "ethical propaganda". He used this to manufacture his relevancy and sell his career. This book is particularly interesting in that the author and what he writes can itself be understood by what is written. The teaching can be used on itself.
Its first half is boring as hell to me, but I guess it would have been fascinating back then. A little after the half-way point it has grown very dark, talking about leaders instead of elected officials and manipulation instead of representation.
It does show its age in a number of places, but its stories are trivially generalizable.
So far I guess I'd put this on an intellectual's book shelf, though it all seems obvious and not even particularly collectible. I'm not sure if it would "red pill" an everyday person or even be interesting to one.