"Light upon Light" was written by Andrew Vidich who has authored several books on modern mysticism and has taught courses in meditation, Islam, Religion and Death and Dying. Most importantly, the author studied meditation and spirituality for over 35 years under three spiritually illuminated Masters-Sant Kirpal Singh, Sant Darshan Singh and Sant Rajinder Singh. The focus of the author is not only to read the author's words but to embrace them in the deepest recesses of our being. The author has included spiritual exercises that will help the reader digest the teachings of the Masters on a very personal level. There are universal questions that are answered: Who am I?; Why am I here and where am I going? The author compels us to commit to the practice of meditation as and intellectual understanding of the Masters is insufficient to knowing the answers to the above questions. The author provides an excellent metaphor in the difference between an intellectual understanding of water and the experiential or tasting of water. We can study waters' characteristics, its molecular makeup, etc., but unless we taste it we never can have a true understanding of it. The author also states, throughout the book, the need of a spiritual Master in order to succeed on the path. I believe the author's knowledge, his association and training with a true spiritual Master, his presentation of the facts and outline of the meditation techniques makes this book especially compelling. I would highly recommend it.