There are a great many books on survival in all manner of settings, but I've not seen one that attempts the scope of this one.
I found his style straightforward and engaging, and the material very helpful. I can't emphasize enough how much ground this book covers. No single book will be the comprehensive manual for all scenarios, and Nyerges doesn't attempt that. What he does, and well in my opinion, is to provide a solid general foundation that can be applied to a wide range of circumstances, situations which are likely to become relevant to not just the outdoorsman, but also to the average person living in cities prone to floods, earthquakes, and other such crises.
Sure, as one of the other reviewers mentioned, given the breadth of what's covered the author might have provided more detail in some sections. But for most people that would mean a book that weighs in at more than a thousand pages and winds up spending more time looking impressive on someone's book shelf than in their hands where it can inspire good thinking about these things.
As the author himself points out, there are other resources where more detailed information can be found on specific topics, and Nyerges provides those references. But at the same time he covers the basics sufficiently here, and in many cases goes beyond the basics.
Is this book the ultimate bible on saving your skin? I don't think any single book will be. But as an introduction to the skills and awareness needed to survive in a wide range of likely scenarios, this book does what it sets out to do, and in a format that's accessible for the average reader.
I've bought a few copies for friends and family, and even have one more on its way to me now.