First, the reviews for this awful book are from the guy who wrote it (or his wife), and some lady who co-write another book with him. These people are without a shred of character or honesty. Don't buy this book.
The guy has no real doctorate from any accredited institution and yet refers to himself as doctor on every possible occasion. And, if he has an actual Black Belt in anything, it isn't listed anywhere that I know of.
To be a passivist one must have been a warrior, not just passing on some sad issue from his own childhood and inflicting it on actual martial artist community. He should stay out of the martial arts and maybe write books about dance studios or hippie communes, because this kind of junk will get your kid beat up badly in the real world. If you look closely it is the philosophy of failure and cowardly, dishonest action. He would have done very well in the German occupation of France. If you allow your son to read this book, you are participating in the further feminization of his future. Not a bad thing maybe, as these people are in a full-on war against anything masculine or realistic. But, like it or not, there are a few human male warriors left. We aren't violent, but that is because our enemies fear us and we have been in the battle and realize it is nasty. For a warrior, the last resort is violence; for a lying cowering simp, every day is a defeat.
Why not allow your son to be initiated into a warrior tradition like Shotokan or Jujitsu instead of reading this pure psuedo-intellectual junk.
But that's just my opinion, and I may just be out of touch with the new sensitivity. Thank goodness.