Although I'm not certain about his political or philosophical bias, I can describe Postman from the impression I got from reading his book. Because he is wary of many things, including social research, the excesses of modern medicine, and our education system, he seems to be counter cultural to some degree. He emphasizes things that most people wouldn't agree with, such as the idea that even religion would be a workable narrative through which to view the world. Postman is very careful not to put down religion, although to me, it seems that he has a low view of it. Overall, Postman is very wise and is willing to speak the truth, regardless of whether it clashes with what's currently in fashion.
Postman writes for a broad audience.
The material is non-technical and very accessible. I think it is important, considering Postman's emphasis in the last chapter, for teachers and professors to read the book and take Postman's ideas seriously. Students, consumers, and Americans in general, would be advised to read this book. Postman explores ways in which technology can have adverse affects, which are often not even questioned. Specifically, technology leads to knowledge monopolies.