The Spiritual Science of Kriya Yoga
This fully illustrated book is the most complete text available on the theory and practice of Kriya Yoga. The Spiritual Science of Kriya Yoga takes the student step-by-step through the eight stages of Patanjali's Kriya Yoga system and contains extensive chapters on hatha yoga pranayama, mantra, meditation and samadhi. Goswami Kriyananda explicitly teaches how specific asanas can be used to balance each of the seven charkas. If you could only have one book on yoga, this would be it!