Field of Fire by Marc Cameron
This time, Quinn, an Alaska-born OSI Agent, is back with his girlfriend, FBI agent extraordinaire, Veronia “Ronnie” Garcia and his running buddy, the oversized Cajun, Jacques Thibodaux, devoutly married with 7 sons.
When a deadly nerve gas called New Archangel is unleashed upon the City of Angels, Quinn is enlisted to hunt down the man who created the bioweapon—a brilliant Russian scientist who is trying to defect and is hiding in the Alaskan wilderness. I like Quinn, who’s a take-no-prisoners type with a soft spot for his pals but a fearless relentlessness against any foe.
Cameron is a good storyteller, and as always, I recommend starting with book #1, National Security.