"Vigyan Bhairav Tantra The Book of the Secrets: A New Commentary" Talks given from 01/10/72 pm to 01/03/73 pm(Volume 1) and 25/03/73 pm to 08/11/73 pm (Volume 2) English Discourse series at Woodlands, Bombay, India The original series of 80 discourses were simply called "Vigyan Bhairav Tantra". For publication as books they were divided up into 5 volumes, called the "The Book of the Secrets Volume 1 - 5" (16 discourses each). The books were later published as "Vigyan Bhairav Tantra Volumes 1 and 2", (40 discourses each). The two volumes also came with a deck of 112 cards to represent the various meditations. Now the full 80 chapters are published in one big volume by St. Martins Press onder the original title "The Book of the Secrets". It can be ordered through Amazon.com.