True but Tricky Oct 9, 2008
The basic premise of this book is that your personality type will intersect with your work somewhere between satisfied and miserable. The book lays out in detail the 16 personality types. Apparently everyone in the world can pretty much fit into one of these categories...amazing but apparently true. The practical value of determining your personality type (through exercises in the book) and matching to a career type has obvious value to a career changer.
The only problem is determining exactly your personality type, and then assuming that your model construct of the work place is correct. For these purposes, the book is necessarily complicated...this will no doubt appeal to certain personality types...no disclaimer is presented in that regard.
In any case, the book offers a very interesting view of the workplace, and goes a long way toward explaining why certain types are happy and certain types are miserable in given circumstances.
I would recommend the book as an interesting insight along the way. While it may have value as a career map guide, I wouldn't skip other approaches either. To get the full effectiveness from the techniques in the book, you should probably consult with an expert in the Briggs Meyers method.