Callous (The Alpha Bodyguard Series, #6)

Bodyguard.

Tracker.

Silent Observer.

Life was in the details. The weight of a government issued rifle, the trajectory of a bullet, the speed of the wind—those details were crucial in the Marines. But outside the military, that level of observation was currency, and I was selling my skills to the best security firm in south Florida.

Except I wasn't on a job when I noticed the nervous brunette pushing through the crowded street. Her hair loose, her shirt borrowed, she stumbled in too-big shoes...