I wrote a loving introduction to my pal Erik Davis'  Nomad Codes: Adventures in Modern Esoterica out now from Mike McGonigal's Yeti Books.  The book collects some of Erik's visionary writings from the last twenty years including some of his work for the late and lamented Gnosis magazine, reminiscences of a SoCal stoner youth, meditations on Philip K. Dick, Sun City Girls, Terence McKenna and other key figures.  You can read the introduction here.