The Fallen: Part Two: The Watcher Series: Book Five - The Watcher Series, #5

Betrayed by the person she trusted most, Aleria breaks away from the safety of the Watchers only to become more entangled in the endgame of the Fallen. But fallen angels aren't the only threat. As Aleria's visions become something else entirely, mutiny threatens the new king of the French coven, jeopardizing the delicate truce between vampire and humankind. Now separated from Aleria, desperation pushes Gabriel to join forces with an unlikely ally as he tries to manage the chaos within his own ranks.
But he must remain focused on one objective: stop Semjâzâ before he can enslave the world. The stage is set for an all or nothing battle to defeat the Fallen once and for all.