At Any Cost - Chicago Underground, #1

Martin Caiber has a problem. His father hasn't been in his grave a week and someone is already trying to kill him. As much as he wants to stay away from his father's ties to Chicago's organized crime, he knows that it's not exactly an option. From the moment he meets the woman who calls herself The Hawk, he knows he can't live without her. The daughter of a hitman from Georgia, she's the only one who can keep him alive and find out who wants him dead.
What neither of them bargained on was the fact that he's not the only target...so is she.