The majority of it is about memory palaces in a broad overview but he does touch on the connection to memory palaces and mythology back when mythos/religion was strictly a form oral storytelling. I can't find it now, but he did do about 20 minutes of an interview where he expanded more upon it. I usually recommend Moonwalking as it's an easy read intro to Memory Palaces and how they work. As for Occult and the unconscious, and VR , that's more me and my personal research over the years. But things like Correspondence tables, Chakras, Zodiac, Tree of Life and what not all fit the mold for what a brain would consider a Memory Palace from a functional pov.