The Guardian Series by Lynnie Purcell, Benjamin Locke, Tatiana Vila

Clare has woken up in the desert with no memory of her past and no true direction, beyond the impulse to walk west. She has never been more lost. With no clue about the darkness circling her, Clare is on a direct path with Odette. To add to her a problems, an angel keeps trying to kill her, a Watcher named Jasmine wants to control her, and her only clue to understanding the future is to find a city that does not exist. The war is coming, but will she be ready?

The war with Odette has begun. Cities around the world have fallen, and the world as we know it has ended. It's up to Clare to put things right again. Worse still is the threat of a darker evil that lingers over her as she searches for a way to end the war for good. Will she be enough to face the growing threat? Can she stop Odette before it is too late? The Forsaken is book three in The Guardian Series and the continuation of Clare and Daniel's journey.