I have been doing his course of that book and the microscope one. The book itself is also excellent not the cheapest book, but it's massive and well worth the money for the knowledge in it. If you get it from him it's on sale atm.

The Permaculture Student

Books — The Permaculture Student

All these books & MORE are available internationally through Barnes & Noble, Amazon, & other online & in-person retailers. Matt ...

Its worth it for a tome of information. I will probably order from him. Matt Powers brings the level of nerdiness I'm looking for