Having read a few books on psychedelics recently, I did wonder just how much new information this book would contain, lots, as it turned out. While it touches on some of the same bits as say, This Is Your Mind On Plants by Michael Pollan, it goes far, far deeper into the the history and origins of mescaline usage. While Pollan, especially in the Netflix TV show, comes to conclusion that we should leave mescaline via Peyote to the indigenous populations, Jay doesn't really make any similar statement, leaving it up to the reader to decide. A fascinating book.