In 2004, one of the world's last bands of voluntarily isolated nomads left behind their ancestral life in the dwindling thorn forests of northern Paraguay, fleeing ranchers' bulldozers. Behold the Black Caiman is Lucas Bessire's intimate chronicle of the journey of this small group of Ayoreo people, the terrifying new world they now face, and the precarious lives they are piecing together against the backdrop of soul-collecting missionaries,...