Alchemical Pathways - Frits Julius

Mind and Matter - Arie Sos

The Heart as an Organ for Cognition in the New Mysteries; First Steps Developing the Etheric-Astral Heart ETHERIC-ASTRAL HEART Christine Gruwez

Fundamentals of Biochemistry in the Light of Spiritual Science - Otto Wolff

Meditation - Heinz Zimmermann and Robin Schmidt

Olaf Asteson

The Foundation stone Meditation and the Challenges of our Time - Arie van Ameringen et Christiane Haid

Fine Matter - Philip Thatcher

Good Time - Philip Thatcher