To go deeper, you coud go to Hermetic Spirituality and the Historical Imagination: Altered States of Knowledge in Late Antiquity New Edition by Wouter J. Hanegraaff (Author). He's on the front line of this stuff but it's very humane, experience-oriented, readable scholarship. Fascinating stuff on the use of psychedelics in Egyptian religion.
by Wouter J. Hanegraaff (Author). He's on the front line of this stuff but it's very humane, experience-oriented, readable scholarship. Fascinating stuff on the use of psychedelics in Egyptian religion.