Tantra - Bruhad Mantra- Tantra- Yantra Sadhana Siddhi (Gujarati) An Old and Rare BookBook's Contents and Sample Pages Exotic India Arthttps://www.exoticindiaart.com

by Nalin Pandya: Focuses on the unique Shabari branch of mantras, widely popular in rural Gujarat for their perceived "quick results". Key Authors to Follow

by Dheerajlal Tokarishi Shah: A classic text from 1959 covering the "science of mantras" available in full PDF via the Internet Archive.