Erik Davis, Ph.D., a San Francisco-based author, award-winning journalist and independent scholar, has written for scores of publications, journals, and academic volumes. His books include: Nomad Codes: Adventures in Modern Esoterica; Techgnosis: Myth, Magic, and Mysticism in the Age of Information, and The Visionary State: A Journey Through California's Spiritual Landscape. Erik also explores the “cultures of consciousness” on his weekly podcast, Expanding Mind.