I have to disagree with "Shooting the Stickbow". It does have some accurate information, but also some off the wall stuff and the "author" has never done anything noteworthy with a bow, either hunting, coaching, or in competition.
The video "Masters of the Barebow, Volume III" is a great investment. If you can swing it, a Rod Jenkins clinic will literally take years off the learning curve. Rod is one of the main players in the video mentioned. He's a World Champion archer who has also coached World Champions. Rod is also an accomplished hunter. "The Simple Art of Winning" is the book I'd recommend, by former Olympic archer Rick McKinney.