http://www.btmon.com/Other/E-books/M...e.torrent.html
Probably the #1 book in regards to the subject. The clearest, easiest to follow information out of all the books in my collection (currently own over 10 books in regards to the beloved plant.)
I lent it to a friend and needed to do some research so I looked around a bit and found it online via Torrent file. Not sure what edition it is, as I am still currently downloading it.
Cheers and happy toking mates.