Mantra is the science of sound. Specific mantras are sonic formulas designed to evoke particular energies or deity aspects (Devatas) within the practitioner’s psyche. B. Yantra and Mandala
The emergence of the early Agamas and Tantras (scriptures) in India. index of tantra
There is a book titled Index of Tantra ? If you refer to a specific volume (e.g., from the Tantra Granthavali series), I can help analyze its table of contents or subject index. Mantra is the science of sound