In Up Country, Nelson DeMille cannily revives the army career of Chief Warrant Officer Paul Brenner, the cynical, hardworking Criminal Investigation Division man who was forcibly retired after solving the high-profile killing in The General's Daughter.

Brenner's called back to investigate the murder of a young army lieutenant by his captain. The catch is, the crime took place during the heat of the Tet Offensive, and the only living witness was a North Vietnamese soldier who described the incident in a 30-year-old letter that has only recently come to light.

Soon Brenner, a Vietnam vet, is on an ostensible nostalgia tour of his old stomping grounds. The trip immediately turns dangerous as he heads "up country" to search for the letter writer, accompanied by a gorgeous American businesswoman, who's hiding more than even the smartest CID officer could imagine.

DeMille, who saw his own tour of duty in Vietnam (and even found a letter on a dead Vietnamese soldier), intersperses historical facts and chilling political possibilities with enough local color to provide some serious flashbacks for his fellow veterans.