Start with high-confidence native american history books, then narrow by subgenre or adjacent topics.
Ada Blackjack
Jennifer Niven
Sitting Bull
Stanley Vestal
Art As Performance, Story As Criticism
Craig S. Womack
Reclaiming Two-spirits
Gregory Smithers, Shaun Taylor-Corbett
Bonds of Alliance
Brett Rushforth
Standoff
Jacqueline Keeler