Yantra Mantra Tantra and Occult Science

There is hardly any person who is either not conversant with or not heard about occult sciences of which Yantra, Mantra, Tantra and not heard about occult sciences of which Yantra, Mantra, Tantra and forces are simply tributaries. Hindus, Jains, Muslims, ascetics, peers have written a lot about such sciences but only a selected few know how to use such devices ably and safely. The learned author has given detailed account on use, caution, warnings and methods for using such devices which are meant for relieving or causing agony/harm to a targeted person. The author has furnished relevant details about Yantra, Mantra and Tantra, black magic, sorcery etc. Hopefully, the right information will satiate urge of inquisitive readers, for some of whom it may be a new subject.