This kit should be a required purchase for any yogi-in-training, witch, ceremonial mage or anyone who wants to change their lives for the better. I've thumbed through various psychic development manual and self-help "cookbooks" on positive thinking, etc. and haven't seen any exercises or advice that is direct, clear, practical, and REALISTIC like the Tattwa kit. Dr. Mumford spends only 1 chapter on background info. on Indian use of Tattwas and the rest of the book is comprised of exercise upon exercise. He doesn't repeat himself over and over, tell you to do things he hasn't done himself or without telling you why. You don't have to buy anything else or spend money on his other books or tapes to make this one work for you. If anything, Dr. Mumford is rather unassuming given his credentials. There are no new-age terminologies, feel good 'fluffiness' or abstract concepts. Lastly, you don't need to do the exercises for months before seeing the slightest results. Results, though small at the beginning, are seen from day 1. And if you read ahead like I do, you'll get excited at what you'll be able to do by the end of the book IF you do everything consistently. You only need 10-15 min. a day to do them. This is one of Llewellyn's hidden gems!