In Dark Zone, a race-to-the-finish thriller in the New York Times bestselling Tom Clancy's Op-Center series, the brutal murder of an undercover agent reveals a plot to incite a full-fledged war between Russia and Ukraine.Former US Amb...

In this gripping thriller from the New York Times bestselling author of Out of the Ashes, an Islamic extremist is on a quest for vengeance after his only son is killed and it's up to Op-Center to stophis lethal plot. General Bob Under...