Yet another excellent text by Franz Bardon. This book, taken together with his two other excellent textbooks, form a very strong core of study and practical exercises for the serious student of the Hermetic Sciences. Bardon is clear, concise, and has a good sense of humor. He also anticipates the important questions of the novice in an easy manner and never takes a condescending tone. This is not to say that he is an easy master to learn from. He insists that the student hold him/herself to a very high standard in every aspect of life, and the exercises given are deceptively simple, and very difficult to perfect. In fact they take a lifetime to do so. If you are looking for an easy system to rule the universe, this book is not for you. If, however, you are looking for a system to put you on the path to complete the Great Work, this book, taken in conjunction with Bardon's 'Initiation into Hermetics' and 'Introduction to Magical Evocation' will do just that... and the Path has it's own rewards.