Dragon Bound. Riders of Drakefall Series, #2

She carries the void in her blood, and it may be the only thing that can save them. Bree Valeran bears the scars of Drakefall's siege. Scars that mark her as void-touched and make the Guild Council question her loyalty. But when villages vanish and families are taken for dark rituals, Bree's corruption becomes the only weapon sharp enough to track the threat. Together with her dragon Iona and the other corrupted riders, Bree uncovers signs of an ancient cult.
One that predates Lydia's war and seeks to tear down the barriers between worlds. In Drakefall itself, betrayal festers among the council, and in the wilds a void-born predator hunts the corrupted for their strength. Branded a danger by her allies and hunted by enemies older than she can imagine, Bree must decide where she belongs: chained by suspicion, or free to fight for a future no one else can see.
The war for survival is not over. It has only just begun.