It just feels as though his publisher thought this book would sell well after his other work 'Opium', so he wrote it to order. He waffles on about hippies and 1960's counter culture and doesn't address the real issues, namely corruption and multi-national corporations who conspire to keep marijuana illegal. I didn't like his style of writing and found the book a little unstructured, he leaps about a bit as if his research was done on the quick, as he finds something else out he just goes of on a tangent. He goes to great lengths to say hes not condoning cannabis use which is just a cop out, he doesn't seem to mind earning his money by writing about marijuana but he makes sure that he comes across as just an academic researching the plant. There are better books on the subject out there.