Welcome rz. TBBIV has updates for TBBI with the knowledge accumilated from about 10 years of wood bow making not only by the original authors but from thousands of wood builders from all over the world plus new info from 2 of our won PA members, Marc St Louis and Steve Gardner(aka Badger). If you were interested in bending wood or making recurves I'd suggest TBBII. TBBIII is more about bows of the world and arrows in general with one chapter about solving and preventing problems.
For good descriptions of Eastern Woodland style bows, Cherokee included, the Encyclopedia of Native American Bows, Arrows and Quivers by Steve Allely and Jim Hamm has great pencil drawings with measurements for many Eastern Woodland style bows, arrows and quivers.
I am from Savannah originally. Welcome to PA.