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The mid chapters describing the chakras and nadis, and pranayama and asana associated with them was mainly reasonable. However all of the other ad libbed digressions are shockingly ill informed. The excursions into medical maladies and so-called scientific validation of nadis and ckakras is exactly the sort of rubbish that gives tantra a bad kooky name. I am yet to read anything from the Bihar Satyananda school that wasn't spoiled by this sort of charletan nonsense. Avoid!!