While this book seems to be mostly popular amongst young American college athletes and those around them (coaches, parents, etc) its applicability is a lot wider than that.
The thing is, as this book details, we don’t have to settle for less than optimal in our training—whatever “optimal” means for us, at any stage of life.
The style is largely narrative, and conveys a lot of ideas through anecdotes. They are probably true, but whether they occured entirely as-written or have been polished or embellished is not so important, as to to give food for thought, and reflection on how we can hone what we’re doing to work the best for us.
Nor is it just a long pep-talk, though it certainly has a motivational aspect. But rather, it covers also such things as the seven critical areas that we need to excel at if we want to be mentally robust, and—counterintuitively—the value of slowing down sometimes. The authors also talk about the importance of love, labor, and ongoing learning if we want a fulfilled life.
Bottom line: if you are engaged with any sport or sport-like endeavor that you’d like to be better at, this book will sharpen your training and development.