A collection of letters and instructions from the author to two devoted disciples over the years 1956 to 1960.

Covers a range of topics that include Yoga psychology, self evolution, and the self application of Yogic knowledge. This volume also discusses the advanced meditation practice of Lalya, including class transcriptions.

Aims to serve as a manual of higher sadhana for advanced and initiated aspirants. This title describes the ancient path of Kundalini awakening in its original form before the proliferation of modern Yogic literature.

Gives a contemporary Yogic vision of the Upanishads. Taking a holistic and practical view of spiritual life, this text provides a picture of Yoga.

Aims to blend the teachings of Yoga with those of psychology, psychiatry and other branches of Western science to give us an overview of the human personality, an idea of where we are going and guideline to proceed on our journey.