From Early Vedanta to Kashmir Shaivism: Gaudapada, Bhartrhari, and Abhinavagupta (Suny Series, Religious Studies) (Suny Series in Religious Studies) Paperback – July 1, 1995

Russian scholar Natalia Isayeva does a superb job of introducing us to the ideas of three of India's greatest minds. Gaudapada delineated four "phase changes" of consciousness/reality, Bhartrhari described how sonic pulses of pure meaning can produce a universe, and Abhinavagupta was India's greatest tantric philosopher. This is not a book for beginners wholly new to the Indian tradition, but if you're ready to explore Hindu paradigms in more depth, this is a wonderful study.