I'm doing a sort of fantasy alternate history book and I'm heavily changing the history of the Americas. While there is more info on South and Central America, I want to focus a lot on North America. Could someone tell me or point me to some reliable source on the ancient history of the new world?
This is such a huge topic that you're unlikely to get a good response here without refining the question down to a more particular issue. I'd recommend checking out the relevant section of our FAQ to get started.