Trad bowyers bible vol 1 is good. Also Jim hamm has a book "Bows and Arrows of the Native Americans", that goes into better detail for osage at least.
http://www.amazon.com/Arrows-Native-Americans-Step-Step/dp/1599210835/ref=sr_1_5?ie=UTF8&s=books&qid=1227198344& amp;sr=1-5

Trad Bowyers Bible Vol 4 has a great section on bow woods and suitibility. Vol 2 and 3 really hasn't done anything for me.

Another source that would be really good is James Easter, has a DVD out that goes step by step.

http://www.osagebow.net/MAKING_THE_OSx.html