Far more than a mere history of the practice of yoga and beyond a study of psychedelic-substance use to aid the pursuit of enlightenment, Who Am I? is a broad, expansive journey told through the eyes of a scholar and researcher-a pilgrim in search of the meaning of life.

While the use of psychedelics, yoga, and the interrelatedness of the two practices have been discussed in the past, Who Am I? explores these topics through both a scientific and a personal approach that is altogether new-the author's own journey as he transitions from spiritual and yoga purist to...