Boing Boing reader Kenneth is a weird-and-rare book lover who is painstakingly scanning and posting online some of his favorite obscurities. Among the Golden Guides he's posted (dig the iconic visual style!) is the exceedingly hard-to-find and out of print "Golden Guide to Hallucinogenic Plants" from 1976. I haven't seen it in the wild in ages; it's as rare as an Amanita Muscaria in Siberia. Where, by the way, the native people once ritually drank each other's pee so multiple people could trip off a single 'shroom.
Do check out the rest of his Golden Guide collection, while it lasts.