There are some good "combat" techniques for knife throwing, but "life-saving material" as the title indicates, I kinda doubt it. The author does seem to know his stuff and the illustrations, while basic, are pretty clear and helpful. The quality of the writing, on the other hand, is a bit below par. Topics covered include an introduction to spear-style throwing, basics of combat knife throwing, balancing a knife for throwing, targeting, psychological/physical conditioning, hunting/recreation skills, and a bit of interesting historical/context stuff as well. There is also a fairly in-depth chapter for spear-style throwing as well as one for combat throwing techniques, insomuch as you can go in-depth in about a 100 total pages.
It's an interesting tome but not really a groundbreaking one. It also has some iffy ideas. The challenge as I see it is that the focus of the book is primarily on techniques without looking at the larger picture. I've frankly got a philosophical problem with throwing a knife in combat, even if you are in the military. First off, only weapons balanced for throwing will work properly for that application in the first place so you must be carrying a specialty device in order to be able to execute the techniques. Once you do throw your knife not only do you potentially lose your weapon, but you are also operating at some distance from your opponent. Unless you are in an active war zone, that probably won't play too well in court. After all, if you've got distance you'll have to explain to a jury why you couldn't run away avoiding the confrontation before it became violent in the first place as well as why you were carrying an offensive weapon (throwing knives just aren't defensive devices no matter how you spin it... and knives in general are hard enough to justify in court as it is).
I'm not all that great at knife throwing but I did learn some new stuff and improve a bit from this book. All in all, if you take it as an academic instruction book to develop throwing skills for fun or possibly even for survival/hunting it's a pretty decent reference. From a self-defense perspective, on the other hand, I think it is a bit off target.
Author of Surviving Armed Assaults, The Way of Kata, and Martial Arts Instruction