"Mason Nash thought he’d retired from the spy game until a new and deadly private spy agency, Tartarus, came to hunt him down. When Nash discovers Tartarus have double agents in every legitimate spy agency on the planet, there’s only one place he can go—into the shadows. On the run, Nash has few he can trust. Is his new ally Eva Destruction everything she appears to be? And then there’s the new arrival, Charles Bishop, a man with a past even darker than Nash’s."