Cannabis has been one of the most popular psychoactive herbs across the world, from ancient civilizations to today. With the legalization of cannabis across the United States, there's never been a better time to learn about its history, many uses, methods of use, effects, and strains, as well as its impact on entertainment and culture. Within the pages of this pocket-sized guide, you'll find information, how-tos, and trivia for cannabis users at all levels.