I won't even try to list the stuff that's contained in this book, there's LOADS. I was most impressed with the information on nutrients and nutrient deficiencies, it's the most detailed yet easy to understand info I've ever read about nutrients. And the information about THC is unbelievable! It gives lots and lots of tables and charts about what parts of the plant contain the most THC, how temperature, water and humidity affect THC etc. The info on drying and curing is pretty good too.
The only negetive things I have to say are that the info was a bit scattered, it could do with being organised a little better. It could do with updating a little- it mentions incandescant lights and tin-foil!! It's also a bit thin in certain topics, I could find hardly any info on how to take clones. And it appeals more to the outdoor grower(it talks about buying/mixing soil ammendments by the ton!!)
It contains some fantastic (colour) photos though.
The only thing I use the book for now is to get info on nutrients.