First of all, don't buy it because you can find it for free on the web.
Axiom:
1. a statement or proposition that is regarded as being established, accepted, or self-evidently true. 2. A premise or starting point of reasoning.
The contents are not about a specific indicator or even a trading system, but a framework, or mindset for speculators. I find it a excellent work in order to train your mind in a particular way of thinking about trading.