Tracked By the Fixer by Natasha Sterling

Lilly
And, if you try anything like what you tried today again, I won’t hesitate to kick your ass. I know it’s a stupid thing to text my employer, especially when I don’t have a backup plan, but I’m so angry that I don’t know what else to do. I fire off the text without realizing I’ve sent it to the wrong number, and the man who receives it is going to change my life in ways I couldn’t have imagined.

Isaiah
The minute I get that text from her, I’m enthralled. A fiery girl with plenty of attitude and a sharp tongue is exactly the kind of girl I could fall for. I’ve only known her for a few hours, but already, Lilly means the world to me. There’s one big problem, though: I’m a hitman. I have a lot of enemies who would be willing to hurt Lilly in order to get to me, but what they don’t know is that I will stop at nothing to keep her safe.