Gyatrul Rinpoche is one of a handful of Tibetan masters who have decided to publish certain material usually reserved for "personal transmission." Anyone practicing visualization (so-called "kye rim") according to the nyingma school of buddhism will find this book invaluable help for remembering the many detailed aspects of symbolism involved in this level of practice. The beginner may get bored. Even so, I would recommend you buy it, and wait. You'll need it sooner or later.