Joshua Duffy Books in Order

The Joshua Duffy books follow a different kind of Mark Greaney protagonist. Josh is a former Army infantryman and elite close protection agent who loses his lower leg on a job in Beirut. When the series opens he is working mall security, proud and skilled but barely hanging on financially.

In Armored, a chance encounter with an old teammate pulls Duffy back into high risk work. He signs on with a private security company to guard a United Nations delegation traveling into cartel controlled territory in the mountains of northern Mexico. The pay could change his family’s life, but the mission is built on half truths, and the team quickly realizes they have been used as expendable muscle.

The novel plays out across ambushes, canyon fights, and desperate retreats along the Devil’s Spine, with Duffy forced to hide the extent of his injury even from his own men. The tension comes as much from his stubborn determination and imposter syndrome as from the gunfights themselves.

Sentinel picks up after those events with Josh working for the U.S. State Department’s Diplomatic Security Service. Posted to Ghana with his wife Nichole and their children, he expects a demanding but manageable embassy assignment. Instead, a Chinese backed plot to topple the government turns a public relations trip to a dam site into the opening move in a coup.

Cut off from easy help, the Duffys have to protect an ambassador, a visiting European diplomat, and their own kids while rebel forces, foreign mercenaries, and hired killers converge on them. The story shifts between motorcades, safe houses, and jungle hide sites, always anchored in the family’s worry about what happens if either parent does not make it home.

Across the series Greaney leans into the gritty, blue collar side of contract security work. The books spend time on gear checks, team dynamics, and the realities of operating with a prosthetic limb and a tight budget, but they are just as interested in Josh and Nichole’s marriage and the cost of choosing danger again and again. This page gathers the Joshua Duffy novels in order and offers the background you need to follow his path from wounded bodyguard to frontline protector once more.