Tom Clancy's The Division: Hunted

An Operation Cross Roads novel.

An Agent turned rogue poses an apocalyptic threat to the Division, unless her former friends can eliminate her first, in this rip-roaring instalment of the Operation Crossroads series.
 
Division agent Maira Kanhai is alive. Maira Kanhai has gone rogue. When Brenda Wells learns that her old recruit’s – and close friend’s – watch has turned red, she refuses to believe it. Yet the agents sent to track Maira down have irrefutable evidence saying otherwise. With the threads holding the Division together fraying under heavy assault, Brenda desperately assembles a specialized Division cell and heads out to learn the truth. In the blistering heat of the American Southwest, they face grave danger at every turn. There they learn that other deadly parties are stalking Maira too, hoping to use her to destroy the Division once and for all.