It is a shame that the splendid message in the book loses credibility because of the biassed stance of the author, and from focus because of the sheer volume of overly detailed writing.
In a nut shell, as derived from her own interesting personal experience, she advocates the mantra that 'what does not kill you will strengthen you'. And this really is a message to be given a better status as alternative to the overly protective anti-stress/relaxation industry mantras.
But she takes over 300 pages to damn the current stress concepts and management as if everyone can sooner or later deal with any amount of stress. But nervous breakdowns and the overloads that drive parents to shout at children are too readily dismissed as simply variations on the theme of a failure to hang in there. For many, they are very real.
And she fails, even in the final 50 pages where she offers advice rather than damns, simply because she talks of the all powerful panacea of hanging in there with stress, and never mentions the reality of how to handle the intermediate ailments of failing to cope with overload/stress or whatever you might call it. She seems to legitimise a dismissal of stress simply because there is no one fixed definition.
By way of example, after 30 years or so not fearing dogs, I got bitten by one and subsequently feared each dog would do the same. I knew that this was irrational, but it has taken a few years facing these dogs to actually see my instinctive reaction of fear to calm down - and this is with concerted effort to relax and face the fear.
So the revelation she had in her life simply does not always transfer to others the same way - either you get a seismic shift in your reactions to stress, or you have to face the stress and gradually acclimatise. And if it is the latter, then the fallout until you do can be very very very debilitating. And ever so real. Whatever you call it.
But, in summary, we have allowed the powers that be to start prescribing a softly softly approach to too many things. Dealing with stress face in is often much more empowering, as she explains, than it is destructive. You must just hang in there and not run to your doctor or boss if you start to feel un-relaxed.