Some enemies hide behind borders. Others wear the flag. Lieutenant Jason “Hawk” Mercer doesn’t play by the book. His record is decorated, his instincts are lethal—and his disregard for protocol has finally caught the attention of someone who needs men like him. Recruited into Black Shield, a black ops strike team that doesn’t officially exist, Hawk is thrown into the heart of a domestic threat no one’s prepared to face. A stolen radioactive source. A homegrown insurgency. And a silent countdown to an unthinkable attack. As the team chases leads from the backroads of the Midwest to the corridors of power, one thing becomes clear: the enemy isn’t just inside the gates... they’ve been invited in. Fast-paced, tactical, and terrifyingly plausible, Black Shield is the explosive first entry in a new military thriller series for fans of Vince Flynn, Brad Thor, and Jack Carr.