Of all of Geshe Kelsang Gyatso's books, this one remains my favorite. This, my friends, is the life blood of Buddhist practice - how to rely upon the Spiritual Guide (Guru). This is a verse-by-verse commentary of the Lama Chopa prayer composed by the first Panchen Lama centuries ago, so at times it is very technical (i.e. what to visualize at certain points during the actual practice). But reading this book you truly begin to understand the nature of the Spiritual Guide, particularly from a Tantric Buddhist perspective. When I used to perform Lama Chopa pujas and prayers, I would get confused as to the meaning of certain passages; with this book, you can open it up right to the verse in question and read an in-depth explanation.
Not a book for beginners to Buddhism (try Eight Steps to Happiness or Joyful Path of Good Fortune by same author first), but great for individuals who are interested in improving their relationship with their guru, or in practicing Highest Yoga Tantra.
Thank you, Geshe Kelsang, for this amazing book!