Illusions — Aprilynne Pike

"I don't do patrols, I don't go hunting, I just stick close to you. You live your life. I'll keep you safe," Tamani said, sweeping a lock of hair from her face. "Or die trying."
Laurel hasn't seen Tamani since she begged him to let her go last year. Though her heart still aches, Laurel is confident that David was the right choice.
But just as life returns to normal, Laurel realizes that a hidden enemy lies in wait. Once again, Laurel must turn to Tamani to protect and guide her, for the danger that now threatens Avalon is one that no faerie thought would ever be possible. And for the first time, Laurel cannot be sure that her side will prevail.