‘Killers of the Flower Moon’ author, David Grann, on uncovering hidden history

His books are on the bedside tables of Hollywood’s biggest directors.

David Grann started out as a journalist covering Washington politics before becoming a prolific author.

His last book was adapted by Martin Scorsese – and premiered at Cannes this weekend – receiving a nine minute standing ovation.

He speaks about his latest work, “The Wager”.