Based on his groundbreaking reporting for Vanity Fair, Hunting Season is award-winning journalist James Harkin's harrowing investigation into the abduction, captivity, and execution of James Foley, at the hands of the masked militant known as "Jihadi John" (Mohammed Emwazi), and the fate of more than two-dozen other ISIS hostages. On August 19, 2014, the jihadist rebel group known as ISIS uploaded a video to YouTube. Entitled...