I can't speak to Native religions, but Graham Harvey has edited a volume called The Handbook of Contemporary Animism, which I find a very good approach in bringing a variety of perspectives on indigenous beliefs. Beyond that, I like Vine Deloria (God is Red and The World We Used to Live In) I think are very good and I've heard good things about. There are some others, but I haven't read them recently so I'd have to hunt them up to get authors/titles right.
Hi, not specifically about Native American religious beliefs, there is a great book named Hanta Yo, following the oral stories handed down through a Lakota community, by the nominated story teller. It certainly outlines the Native American connection with then creator, their community and the land on which they depend.