Gnosis: The Nature and History of Gnosticism
Kurt Rudolph
Gautama Buddha
Rohini Chowdhury
How the Secret Changed My Life: Real People - Real Stories
Rhonda Byrne
The Oxford Handbook of the Apocrypha
Gerbern S. Oegema
Encyclopedia of the United States Congress
Robert E. Dewhirst & John David Rausch
Notes on Spiritual Discourses of Shri Atmanand
Shri Atmananda & Nitya Tripta