Richard Kaczynski is touting the Vienna Forum for Theology and Religious Studies publication of Yoga in transformation Historical and Contemporary Perspectives, edited by Karl Baier, Philipp André Maas and Karin Preisendanz. He notes:
“This book contains Karl Baier’s fantastic ‘Yoga within Viennese Occultism: Carl Kellner and Co.’ (p. 387-438), with three never-before-published photos and a short note by Kellner on reincarnation, also hitherto unpublished: important O.T.O. history!”
You can download it for free: https://www.vandenhoeck-ruprecht-verlage.com/themen-entdecken/theologie/religionswissenschaft/16133/yoga-in-transformation.