From acclaimed author and screenwriter Derek Haas comes a unique and thrilling twist on a family story—what happens when an elite assassin becomes a father?

The struggle is not with his conscience. He enjoys his gig. But a child forces him to weigh selfishness versus safety. Continue his line of work, and he'll always wonder if he's putting his child's life at risk. His partner, Risina, serves as his fence. Like Columbus, she's good at her job and likes doing it. An unusual take on working motherhood . . .

When the next assignment comes in, both Columbus and Risina are surprised to find that the mark is another assassin: a brash, young killer named Castillo. Castillo is an assassin on the rise. Even Columbus is impressed by his tenacity and talent—and as he closes in on his target, he...