The creation story of the Sahnis, or Arikara, people begins with a terrible flood, sent by the Great Chief Above to renew the world. Many generations later, another devastating flood nearly destroyed the Arikaras when the newly built Garrison Dam swamped the fertile land of the Fort Berthold Reservation in North Dakota. Between the Floods tells the story of this powerful Great Plains nation from its mythic origins to the modern era, tracing...