Authored by a hydro store owner that knows 10,000 growers and how they all failed. The Grow Book & Equipment Guide has everything you need to know to succeed, and perhaps more importantly, everything you need to know to avoid failure. After all, you've watched the videos, you've heard what The Grow Boss (TGB) has to say and now you can read that information and peruse the pictures at your speed (cuz we know TGB talks super fast).
It doesn't stop there though, TGB has also authored several other books and the Know More Grow More Cards. All designed to help you succeed (or at least not kill your plants). And you can be sure of that because TGB knows how 10,000 growers before you have failed.
Buy the books individually or save money on shipping and buy The Grower's Kit. Don't be afraid to explore and combine products as well, check out the GB Mega Meter, the Ultimate RO and if you still need more help, the $49 Phone Consult.