William C. Dietz 
Bodyguard [EPUB ebook] 

From a New York Times–bestselling author: In a future where androids do most of the work, one man manages to find a job—but it may cost him his life . . .   Max Maxon is an ex-marine who makes his living with a gun. Sasha Casad is a rich teenager trying to catch the next spaceship home. Max’s job is to get her there alive. Somebody’s trying to stop them–somebody with plenty of money and firepower. That doesn’t bother Max. A contract is a contract. Against all odds, he’s going to fulfill this one. And then he’s going to make somebody pay!