David B. Gray is the Bernard J. Hanley Professor of Religious Studies at Santa Clara University, in Santa Clara, California, where he teaches a wide range of Asian religions courses. His research explores the development of tantric Buddhist traditions in South Asia, and their dissemination in Tibet and East Asia, with a focus on the Yoginitantras, a genre of Buddhist tantric literature that focused on female deities and yogic practices involving the subtle body. His publications include numerous books, journal articles and book chapters, focusing on the Buddhist tantras and their exegesis.