The editorial review(above) says that this is not for casual readers. Of course not, what "casual reader" would be looking for a book which shows how to enter directly into a fully enlightened condition of life. Anyone not interested in such information should read nothing on Dzogchen or Zen. Those who are interested can begin Dzogchen studies very successfully with this clear, convincing and inspiring book. The meaning of Dzogchen, its methods and its results are superbly presented -- and offered in a series of steps which include meditation guidance to be followed in moving into and on from each step presented.
There is nothing obscure, vague or misleading about the writing in this book. For those stumbling on the book and simply curious to find out what this odd sounding business of Dzogchen is all about -- don't bother, YOU will find it obscure and certainly uninteresting. If, on the other hand, you are a serious spiritual seeker with some familiarity with Zen or Vedanta(non-dual traditions) then you will probably be excited to find such a direct, clear and useable volume as this.