Black Dawn - Cristin Harber

What happens when nothing is as it seems?

After inventing a sought-after intel program, Lexi Dare is on a one-woman mission to stay alive. Both at home and at work. Because how did she end up with a ring on her finger and an abuser in bed as she readies to hit the high point in her career? Everything should be perfect. Amazing job. Handsome fiance. It's all a disaster.

Parker Black is the brains behind Titan Group, an elite security firm. In his world, everything is ordered and controlled, except what he feels for his buddy's girl. Something in her eye screams for help, but he has no idea what.

When Lexi disappears, Parker realizes what he should have known. The lines blur between friendships and work, and they must find each other to survive a terror attack that only Lexi can stop.

Black Dawn can be read as a standalone and does not have a cliffhanger.