"#1 New York Times, #1 Wall Street Journal, and #1 Publishers Weekly bestselling author Brad Thor is back with his most gripping thriller yet! In ancient texts, there are stories about men who struck from the shadows, seemingly beyond the reach of death itself. These men were considered part angel, part demon. Their loyalty was to their families, their friends, and their kings. You crossed these men at your peril. And once crossed, there was no crossing...

"The newest thriller in the #1 New York Times, #1 Wall Street Journal, and #1 Publishers Weekly bestselling series! Across Europe, a secret organization has begun attacking diplomats. Back in the United States, a foreign ally demands the identity of a highly placed covert asset. In the balance hang the ingredients for all-out war. With his mentor out of the game, counterterrorism operative Scot Harvath must take on the role he has spent his career...