The Shivyog Durga Saptashati Beej Mantra Book is a treasure trove of spiritual knowledge, offering:

(spiritual practice) and the "Science Beyond Science" approach popularized by Shiv Yog. Vibrational Potency

AsthaKrafts Durga Tantram Sri Durga Saptashati Beej Naam Mantratmak Guhya Beej and Gita Press Durga Saptashati Book (Code 1281) (Hindi) श्री दुर्गा