The Blue and the Gray book by John Leekley

The bond of blood made them a family. War made them enemies.
The Geysers and the Hales: one set of cousins sweated its living from the soil, the other from a small-town newspaper. One made its home in the South, the other -- only a few miles ride away -- in the North.

The Geysers and the Hales were a family, bound by blood and faith and love, and a fierce indomitable pride that was the same on both sides of the Mason-Dixon Line. Until a raging storm of controversy split the states, North and South. And the Geysers and the Hales discovered that -- until the nation stood united once again -- bonds of love and faith and family could have no meaning anymore.