Hari Om, Pranams Spanda Tattva (An exposition of an ancient method of sadhana.) By Swami Akhandanand Saraswati English Translation by Smt.Purnima L.Toolsidass (ptoolsidass at gmail.com) Here is the link to read / download the book https://archive.org/details/TheSpandaTattvaBook regards Durga Prasad