I found this book to be quite fascinating. It really resonated with the methodology that we instruct within the NLB/ISP System. But what it did in great fashion is delve into the true mentality of what it means to defend yourself, and the realistic and horrible things you may need to execute in order to survive.
It's not just about how to defend yourself, but more about putting yourself into the correct mental framing PRIOR to a situation where you may need to use violence to save yourself or your loved ones.
Several of the stories were quite fascinating, and helped to hone in on the message of each section.