Devlin by Anna Hackett

In the aftermath of a deadly alien invasion, a spy and a soldier find themselves locked in an alien cage and told…mate or die.
A covert mission gone horribly wrong. Cool, composed spy, Devlin Gray is used to bad situations, but locked in the bowels of an alien facility with tough, sexy soldier Taylor and told to mate is bad. Very bad. During his career, he’s had to lie and kill, he’s been betrayed, and he knows he works best on his own. Now he is forced to depend on Taylor, and together they have to find a way to escape before it’s too late…

Taylor Cates has already been to hell once before. She lives to fight for others, just like her mother once fought for her, and Taylor vows to do whatever it takes to escape the aliens. As she works with the sexy, suave Devlin, she starts to see glimpses of the man beneath the cool exterior. An exterior she soon finds she wants to melt.

In the worst of circumstances, a passion is born. But on the run for their lives, Devlin and Taylor soon discover far worse things in the alien facility: human prisoners and a weapon that could be the very downfall of the human race. A weapon that will threaten their friends, their home, and everything they hold dear.