Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A comprehensive book about yoga and consciousness.

"Thirumandirum" written by the siddha Thirumoolar is a classic piece of art on yoga and the different states of consciousness experienced by the devotee on the path to Nirvana. It contains 3047 verses which is written forcefully on the real meaning of life. This work is far more comprehensive than Patanjali's "Yoga Sutras" on yoga and the ways of upright living. If one reads this work with reverence and meditates on these words, one will reach the highest stage of God-Realization. This volume also contains an extensive glossary on Sanskrit words and a detailed introduction on the 9 Tantras.