This week, we're hearing from authors whose works have been adapted to the big screen. In this 2017 interview, NPR's Steve Inskeep asks David Grann about his nonfiction book Killers of the Flower Moon, which recounts how white settlers conspired to kill members of the Osage Nation in the 1920s in order to take over their oil-rich land in Oklahoma. The story – which also involves the FBI's first major homicide investigation – is at the center of Martin Scorsese's latest film.