Embracing Silence (Project Alpha #1) by N.J. Walters
Earth 2133 Tienan is an Alpha-an assassin who has been genetically and computer enhanced. He has escaped from the lab that created him and the Ruling Council that controlled him. He is now outside the Gate-a high-tech shield that protects the enclosed city from the contaminated and lawless land outside.
Tienan must constantly evade security forces sent to eliminate him, his only goal to destroy his former masters. Silence is a tracker with the Resistance on the trail of a dangerous stranger. The hunter becomes the hunted and when Tienan kidnaps her, she thinks her life is over.
But both captor and captive are enthralled with one another. Desire and need ignite each time they touch. Enemies become lovers. Treachery and mistrust drive them apart. But nothing can diminish the sexual heat smoldering between them. With enemies all around, they must confront each other one final time. With time running out, sexual longing and trust battle with betrayal for supremacy.