The “TL;DR” on this is: BUY THIS SET. The set is well worth the price.
Volume 1 deals with how to establish you own “Neighborhood Protection Plan”, to involve your neighbors in defending your area from events beginning at a Crisis Event through a Prolonged Crisis Event, and up to a Total Collapse of Society. The book walks you through the process from an initial meeting through operating your security group during a full collapse/WROL situation.
This is not an “overview” and “general concepts” book. This is a nuts-and-bolts complete operations manual. It discusses the roles and duties of every position you’ll need, the gear you’ll need, the people you’ll need, and how to organize your defense, right down to running an Entry Control Point, which I’ve discussed here and will be running in my next book.
All in all, this is a great book and I highly recommend adding it to your library. I would also recommend getting it ring-bound for ease of use. It’s in a large format and large print, because when you need it, electricity won’t be there for you to read by and large print is easier to see in the dark.