The book gives principles or rule of thumbs on the behavior of cybernetic systems (which can be almost anything: Companies, machines, nation states…).
The style is direct and dry and the assertions tend to be more cranked-up rather than careful; fittingly, what I called “rule of thumbs” is refereed to as “axioms” of system behavior.
The author gives many examples, mostly ones where things go wrong due to being unaware of the systems behavior pointed out in the rules. These examples are often several decades old, on the other hand, they are still easy to understand and illustrate the points well, so the do want they should and it is probably better than referring to some hyped technology that might be forgotten in 5 years.
I enjoyed collecting own examples for the rules and connecting them to other ideas from psychology, project management or anthropology.