From the #1 international bestselling author of The Revenant - the book that inspired the award-winning movie - comes the remarkable true story of the worst mining disaster in American history. In 1917, the lives of a company of miners changed forever when the underground labyrinth of tunnels in which they worked burst into flames. Within an hour, more than four hundred men would be locked in a battle to survive. Within three days, one hundred and sixty-four of them would be dead.