Help question

 

Can anyone attending here recommend to me a book or books (or website even) about the belief systems, cosmology. etc. of the eastern North American Indians, particularly the collective group now called the Haudensaunee (formerly the Iroquois COnfederacy and similar).  I have a book on th mound-builder Cahokia world, but I'm looking for something more northern/coastal/Appalachian.