I just picked up the later addition of this book (Marijuana Horticulture: The Indoor/Outdoor Medical Grower's Bible), and I gotta say, this thing is PACKED with info and pictures. Flipping through was like a textbook. A lot of the info I'd already picked up around the forums here, but there were a few things that were new to me, and it'll be nice to have it all in one place to flip through. Really really impressed with it.