A cannabis revolution is taking place, and as people embrace it as never before, they are interested in legitimate information about the beloved plant, not just rumors and legends. Reflecting on thousands of years of cannabis use, journalist Alex Halperin offers an intelligent, in-depth, but accessible overview, and in this illustrated, comprehensive A-Z guide, hundreds of entries cover the key information from the cannabis world, from health effects, CBD oil, and varieties of the plant, to legalization, big business, and psychological impact.