On the run from the murderer of her best friends, missionary Gracie Benson is all alone in Siberia. What she doesn't know is that she has in her possession a medical secret that will save millions of lives—or cost hers. Trying to keep her alive is an FSB agent, a man pursued by his own demons, including a killer who destroyed his father's life. He and Gracie find themselves in a decades-old mystery of betrayal and Cold War secrets. Only with the help of their friends—a group of Americans and Russians committed to freedom—can they outwit the old guard . . . and save Gracie's secret, as well as her life.

An inexplicable ailment was striking down the children of Russia; in less than forty-eight hours, American medical missionary Sarai Curtiss had watched two young patients slip away, and she feared she might have an epidemic on her hands. Yet how could she help anyone in the middle of a violent coup? The new leadership had demanded all foreigners leave the state—on pain of death. Unwilling to leave her clinic, but unable to combat her enemies alone, Sarai had to join forces with an unlikely ally—Roman Novik, the rebel Cobra Captain who broke her heart. Faced with a corrupt government, a brutal military and the truth of their own deepest feelings, it would be a race against time to save the lives on the line—and an entire country at risk.

Into a nest of vipers… Her sister had vanished, trapped in a human slavery ring. To find her, FSB agent Yanna Andrevka arranged her own kidnapping into Taiwan’s sex-trafficking trade. And found herself with no way out. Until Yanna discovered an ally deep undercover: Delta Force captain David Curtiss. He was after the kingpin of the Twin Serpents, the organized crime syndicate that had Yanna—and hundreds of others—in their clutches. With opposite agendas, David and Yanna had to rely on each other to outwit their cold-blooded enemy.