Original Teachings of Swami Yoganandaji - Vol. 4 (Praecepta Step 7 - Lessons 148 to 182)
Original Teachings of Swami Yogananda - Vol.2 (Praecepta Step 4 to 6 - Lessons 79 to 152)
Original Teachings of Swami Yogananda - Vol.1 (Praecepta Step 1 to 3 - Lessons 1 to 77)
Original Teachings of Lahiri Mahasaya Vol.1
Origin of Spiritual Instruction
Origin of Hindu Second Part Arya Never Was Aryan
One Plus One: Infinity Or Eternity?
One Plus One: Infinity Or Eternity?
One Hundred and Eight Questions