What was best about the book is that it incorporated some important invocations that many Tibetan Buddhists say, regardless of what school they may practice. What was harder to follow was the condensation of the Six Yogas that constituted the second part of the book. Since I have another, fuller translation of such, that may be just an inconvenience for me. It may, however, arouse the curiosity of the novice practitioner and encourage that person to find a proper teacher. Sadly, as I have noticed over the past 50-60 years or so, there are many works in Tibetan that remain only.in the original language, books that Garma Chang refers to in the text.