There is a fascinating book on the history of the Pennsylvania hemp industry called Hempstone Heritage. While the book isn't about "weed", it is essential history that people should know. It was written by a local author named Les Stark, who happens to be from my hometown. Les is working hard to make hemp legal again in Pennsylvania and is urging everyone to get up to speed on this info. You can buy it off his website HempstoneHeritage.com