Tools for Tantra by Harish Johari draws on all the sciences - astronomy, astrology, numerology, physiognomy, physics, chemistry, alchemy, Ayurveda (the traditional medicine of India), psychology, mathematics, geometry, and so on - to provide a practical means of realizing the highest ideals of philosophy in daily life.
Instead of separating and categorizing the different areas of human knowledge, Tantra Yoga draws them together. Geometric forms used for centuries as tools for meditation, Tantric yantras were lost to the modern world until Harish Johari's research revealed them.
His illustrations of yantras are reproduced in full color. Tools for Tantra also contains a large number of mantras and practical guidelines for tantric rituals and mantra yoga.