The Pot Book A Complete Guide To Cannabis Its Role in Medicine, Politics, Science, and Culture Edited By: Julie Holland, M.D. (with contributions by various medical doctors, Ph.D. scientists, legalization spokesmen, etc.) This has got to be the best book i have ever read about cannabis. It covers the history of this beautiful plant in pretty much every facet of its use. From historical contexts, to the descriptions of all the major events leading to its criminalization. Regardless of your position on cannabis this book is a must read. A fantastic addition to any herb lovers bookshelf.
I got it at Barnes and noble. The one by me has a really good section with all sorts of counter culture books, near the sociology section I believe.