The Supreme Art and Science of Raja and Kriya Yoga is a master text on a subject that is attracting the interest of an increasing number of truth-seeking individuals in the current era. Stephen Sturgess has precisely and accurately explained philosophical concepts and spiritual practices for the benefit of readers who are prepared to effectively use them. -- Roy Eugene Davis, a direct disciple of Paramhansa Yogananda In today's modern world of yoga, with all its acrobatics, gymnastics, and ever-new wild inventions, Stephen Sturgess' book stands out as a pearl, as it is deeply rooted in the true ancient yoga tradition, which has only one goal: enlightenment. Stephen's yogic authority for that inner journey is palpable. This is a book by a sincere yogi for sincere yogis. -- Jayadev Jaerschky, author, lecturer, Kriyacharya at Ananda Assisi, Italy Stephen Sturgess has produced a true tour-de-force. The Supreme Art and Science of Raja and Kriya Yoga is a comprehensive and clear compilation of the spiritual teachings of yoga. Sturgess's book opens up both the ancient philosophy and the modern practices of this science. It deserves a space on the bookshelf of all sincere seekers. -- Nayaswami Jyotish, Spiritual Director, Ananda Sangha Worldwide and author of How to Meditate and numerous other books on yoga The Supreme Art and Science of Raja and Kriya Yoga will provide not only extensive information about hidden aspects of Yoga, but also an opening to the deeper wisdom of Yoga within ourselves. -- from the foreword by Dr David Frawley (Pandit Vamadeva Shastri) D.Litt., Padma Bhushan, Vedic Education (Government of Indian) and Director, American Institute of Vedic Studies