The stakes are highand the passions are higherin theNew York Times bestselling authors sexy post-apocalyptic thriller.

Before surviving the Scorpius bacterium, Tace Justice was a good ole Texas cowboy who served his country and loved his mama. After Scorpius, the world became dark, dangerous, and deadlyand so did he. The Vanguard medic is stronger, faster, and smarter than before, but hes lost the line between right and wrong. His passion is absolute, and when he focuses it on one woman, theres no turning back for either of them

Sami Steel has been fighting to survive right alongside Tace, convincing the Vanguard soldiers shes one of them. In truth, Sami is a former hacker turned government agent who worked at The Bunker, where scientists stored both contaminants and cures. Only she knows the location, and shes not telling. Yet when passion explodes between her and Tace, shell do anything it takes to save him.