Primal Dragon by McKenzie Rogue

Henrik:
On a mission to find the vampire who is responsible for killing his parents, Henrik’s out for blood. His dragon loves the rush of a fast car, a down-and-dirty fight, and the adrenaline that comes from not knowing whether they’ll live another day, and this threat facing Chicago is just what they both crave. What looks like a trafficking ring on the surface goes so much deeper, and Henrik’s bound and determined to find out what.
But in the midst of fighting the war, a wounded kitten crosses his path… and leads him right to a curvy, spunky human woman that his dragon scents out right away. There’s no denying the voice in his head demanding “MINE”.

Quinn:
Quinn’s best friend has gone missing, and she’s determined to do whatever she has to in order to find him.
The fact that he’s a vampire spying against the bad guys is beside the point.
What she finds is an overbearing dragon shifter prince who doesn’t like that she’s involved with all the chaos. He’s in her way, but he does have some qualities that might help her quest.
And if those don’t help, at least he’s got rippling abs that she could stare at for hours. It’s all a means to an end. They’ll help each other but then she doesn’t want it to end.