Very well organized and presented, practical, down-to-earth and presented without the sort of weird attitude some of the literature in this area has. In other words, it covers the possible need to defend yourself, but that's a very small part of it, as it should be, whereas a lot of books on prepping and survivalism don't get far past the "Red Dawn" guns and ammo stage. When I come across something in that vein, I know it's not from someone who has actually done much of this stuff, because in twenty years in the Marine Corps, even in a military setting we spent more time on staying fed and hydrated, taking care of our feet, staying warm enough or cool enough, avoiding getting eaten alive by the bugs or getting badly sunburned, and maintaining hygiene than on planning fields of fire for the machine guns and registering targets for the mortars (my MOS in my first enlistment.)
I think that's because the author is drawing on years of experience actually taking small groups of people into the wilderness and teaching them the skills to live without a lot of the infrastructure we take for granted, so it's strictly this-works-and-this-doesn't-and-here's-why.
The book includes a lot of specific, concrete recommendations, sometimes of specific brands and products and sometimes of general types, but useful in either case. My wife and I have given this subject some thought and preparation, mostly by way of having a couple of hundred gallons of potable water in barrels with a hand pump, several weeks worth of shelf-stable food (including pet food), hand tools that don't need electricity to work, a little reference library with the Foxfire books and various others, and a generous stock of medical supplies. The guns and ammo are in place too, but not as a priority. We know that contrary to the lurid predictions of a lot of people, when there are natural disasters and the system does break down, people generally pull together and help each other out, and our neighbors are good people.
Even with my couple of decades in the service and my wife's experience doing quite a bit of backpacking, since neither of us has dealt with a situation of hanging out at home without power, running water, etc., this book has come up with some "How did we not think of that?" items that by themselves would justify the cost of the book.
We are lucky enough to live in a part of the southwest with remarkably few natural disaster - we don't get big quakes, floods, hurricanes, tornadoes, blizzards, or fires that would get near us. We just get heat in the summer and this drought that seems likely to outlast us and maybe our kids (who are in their forties.) We've both lived in places prone to earthquakes, hurricanes, and floods before, so we know how fortunate this is. But as seniors with some disabilities, we would still be unwise to make no preparations - it's like making sure your vehicle has a spare tire and jumper cables. Highly recommended to anyone who lives anywhere they rely on any kind of infrastructure that might go away on short notice.