A new book which seems to be tuning into the group gestalt du jour is Clifford Pickover’s Sex, Drugs, Einstein and Elves (Amazon US and UK). With in-depth chapters on the DMT experience and other hallucinogens, as well as quantum physics and other topics (not many books would have Hilary Clinton, DMT and Perry Mason in the list of contents). Can’t say I’m familiar with Pickover’s work, but take a look at the list of contents and index to see if it covers the territory you’re interested in.