John Campbell has been practicing yoga and meditation for thirty years, teaching both worldwide for much of that time. A scholar of Indo-Tibetan Buddhism, he holds a PhD in Religion from Columbia University. He is a Fulbright Fellow and has taught at Columbia University and the University of Virginia, where he co-founded the Contemplative Sciences Center (https://csc.virginia.edu/) for research and teaching centered on contemplative methods and traditions. From 2018—2021 he was Director of South Asian Collections for the Asian Legacy Library (https://asianlegacylibrary.org/) which preserves of rare and endangered text collections in Nepal, India, and Mongolia. He is currently working on a multi-volume translation from Sanskrit and Tibetan of commentaries on the Guhyasamaja Tantra, a Buddhist scripture. The first volume of that project was published in 2020 as The Esoteric Community Tantra by Vajradhara with the Illuminating Lamp by Chandrakirti. A native New Yorker, he lives with his wife, three children, and various cats and dogs in Newburgh, New York.