Eye of Heaven — Marjorie M. Liu

Dirk & Steele had a creed: Protect the innocent in secrecy. No member of the Agency was "normal." Each was an outcast, a pariah, a beneficent shadow living under the sun but rarely in its warmth. "Blue" Perrineau was no different. And now, when it was clear that darker shadows existed in the world--people who followed no rule under heaven--every secret was a liability. Blue would soon see.

They came from all over the world to observe Iris's lithe, catlike body and her affinity for wild creatures. But beyond the celebrity of the Las Vegas footlights, a blackness grew. All eyes were upon her, seeking, judging...coveting. But one gaze was that of a savior, a man of electricity and mystery--a mystery as deep and convoluted as her own. And together, they might yet see the dawn.