Prof. Harunaga Isaacson: is Professor of Classical Indology at the University of Hamburg. His doctoral work at the University of Leiden was in classical Vaiśeṣika. He has been a Visiting Fellow at All Souls College, Wolfson College Oxford, and the International Institute for Buddhist Studies, Tokyo, and a Sabbatical Fellow of the American Philosophical Society. He is one of the world’s foremost experts in tantric traditions in pre-13th century South Asia, especially Vajrayāna Buddhism, and is an expert in classical Sanskrit poetry, classical Indian philosophy, Purāṇic literature, and manuscript studies.