The author basically tells you to stop being a wimp and learn to think through what you would do physically and psychologically should the "shit hit the fan" (what he refers to as SHTF). He starts by explaining what happened in Argentina after December of 2001 with the economic collapse and the ensuing crisis leading to high unemployment, high crime, poverty and a (short) period of anarchy. What do you do? How do you survive in these conditions?
Aguirre gives tips on where to live (hint: the country may not be the best place as it is easier to rob or get away with a home invasion there. He says a small town or community is best), home security (think like a burglar, install security lights etc.), how to identify threats (don't look for action movie "stereotypes" of bad guys. Look instead for people who are out of place or people who look nervous) and even has advice on cars and how to drive defensively. For example, when buying a car, "Don't think fancy, think common, inexpensive, and readily available." That way, if you need it fixed in an economic collapse, there will be more mechanics who will know the model and brand and parts will be easier and cheaper to find. He also notes that "A guy in an expensive car is still in danger not because of his car, but because the bad guys may think he is rich and kidnap him."
It's an interesting question