South by southwest : a western story
(Book)

The only way to escape the purgatory of the Florence Stockade was to die. So on February 3, 1865, Zebulon Hogan died and was buried in the prisoners' cemetery. It was young Ebenezer Chase, a runaway slave, who saw his hand clawing out of the dirt over the shallow grave. Zeb has a mission far beyond escape: he's sworn an oath to the other prisoners to hunt and kill a traitorous sergeant. Zeb's problem is that he knows nothing of the surrounding country. But Ebenezer does. By joining forces, they both may get where they want to go.