Analysis of information sources in references of the Wikipedia article "David Grann" in English language version.
And right now I'm working on a new book about a historical mystery. It's about the Osage Indians in Oklahoma. In the 1920s they became the richest people in the world after oil was discovered under their reservation. Then they began to be mysteriously murdered off — poisoned, shot, bombed — in one of the most sinister crimes in American history.