Don Nardo 
Early Native North Americans [PDF ebook] 

It is an often overlooked and understudied fact, that America belonged to indigenous populations well before the new American government came to be. Native Americans have been living on the American continent since about 12, 000 B.C. They were a rich variety of cultures, peoples, and languages. This book examines the history of early Native North Americans, providing readers with insight into past Indian civilizations, their origins, and their plights when faced with settlers and shrinking resources.