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.