White Wings of Desire by Avery Conner

Evelyn Black
I never thought my past was going to come back to haunt me like this. Now, I’m the target, hunted by the deadliest man of our generation.
Our first meeting changes everything. Instead of killing me when he has the chance, he does something completely out of character – he lets me get away.
I’m trapped in his game with no way out. I’ll do whatever it takes to stay alive, even if it means playing by his rules.

The White Dove Killer
She is supposed to be just another job: Evelyn Black, as poisonous as the deadly nightshade.
One missed shot turns my entire world upside down. After eighteen years in the business, this is a first, even for me. Little did I know that she would prove herself to be the missing piece in my collection.
I want her. I need her: whatever it takes, whatever it costs. She might try, but there is nowhere to run. Dead or alive, I will make her mine.