The Colemans The Reckoning

The young Coleman brothers face unimaginable challenges as they leave the hills of Kentucky for the first time in search of their parents' killers. Though capable young men, Caleb, seventeen, and Zack, fifteen, could not have anticipated the events that awaited them beyond the friendly hills of the Cumberland.
Knowing their father only as an outdoorsman and a Kentucky farmer, they are surprised to learn of his former life as a famous mountain man. Everywhere they stop, it seemed someone knew his name.
Over the next few months, the Coleman brothers would learn that there was a side to their father they knew nothing about. In coping with the harsh realities of life beyond the hills of Kentucky, in pursuit of a pack of ruthless killers, the brothers also learn a great deal about themselves.
When the brothers finally catch up with the killers, they are seriously outnumbered as they match wits, muscle, and skill with the men who murdered their parents.